science fair experiments for 4th graders

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1000 science fair projects with complete instructions.

74 Science Projects for 4th Graders

Looking for science projects for 4th graders? Our fourth grade science experiments are engaging, fun and educational, making them a great starting point to inspire a love of science.

4th Grade Science Project FAQ

What are some easy 4th grade science fair projects.

Explore these fascinating 4th grade science experiments that are not only easy to do but also make science fun! Get ready to be wowed while discovering important scientific concepts!

Sinking Through Water

Egg with Vinegar

Does Milk Help Plants Grow?

Magic Milk Painting

Breakfast and School Performance

Plant Growth and Water

Sparkling Rainbow Crystal

Plastic Milk

Does Dog Saliva Kill Bacteria?

Super Hero Egg Shells

Science fair project details right above the FAQ!

What is the best 4th grade science fair project ever?

We love the Plastic Milk science project for 4th graders. Turning milk into plastic may seem like a magic trick, but it's a classic experiment that demonstrates how heat and acid can make milk plastic-like! Young scientists will learn about the precipitation of solids and the chemical reaction between acids and bases from this cool experiment! Check out the videos to see how to make lego figures or glue from this science experiment!

Check out more Best Science Fair Projects →

What are some cool 4th grade science projects?

Get ready to be amazed by these super cool fourth grade science experiments! Choose a science experiment that catches your interest, and with just a few simple materials, you'll discover how awesome and fun science can be!

Create a Tornado in a Bottle

Electrifying Lemon Battery

Making Oobleck: Liquid or Solid?

Egg Drop Project

Colors of Skittles Experiment

Cloud in a Bottle

Science fair project details at the top of the page.

What are 5 testable questions for 4th grade?

A testable question is a question that we can answer through a science experiment. To do this, we do a control science experiment, then we change one thing in the experiment to see how it affects the result. This is how we can discover the answer to our question!

Explore science projects with these testable questions for fourth graders (find the projects at the top of this page):

What makes a cloud form?

Can drink and food taste different just by changing its color?

Does the color of light affect photosynthesis?

Does temperature affect seed sprouting?

What makes popcorn pop?

Here are more testable questions along with their science projects →

What are the top 10 science projects for 4th grade?

We've handpicked these top 10 science projects for 4th grade which dive into biology, chemistry and physics science experiments. Whether you're looking for a fun experiment or aiming to do an awesome science fair project, these science projects have got you covered!

Shrimp Habitat Preferences

Exploring the Relativity of Time

Science project details at the top of the page!

Can I do a 4th grade science fair project in a day?

Absolutely! Quick experiments using simple materials that you can find at home are an excellent choice for a one-day science fair project! It's ideal to do a simple science project with a fast chemical reaction, like the following projects.

Acid-base reactions: Mixing acids with bases quickly makes carbon dioxide gas!

Make a rocket fly sky high with just baking soda and vinegar! Rocket Film Canisters

Learn how to make your own acid/base indicator using red cabbage and use it to test different fluids! Make Your Own pH Indicator

Chromatography reactions: Separate out colors!

Did you know that some Skittles have a secret rainbow hiding inside them? Colors of Skittles Experiment

Have you ever wondered why leaves change color in the fall? Let's find out by using chromatography to separate the colors of a green leaf! Uncovering Fall Colors

Heat reactions: Heat speeds things up!

Do you want to find out which color candle burns the fastest? Which Candle Burns the Fastest?

What are some hands-on ways to find inspiration for my science fair project?

There may be free admission days or free passes to a science museum near you! Check your local library for free museum passes, nearby science museums for free entrance days and your credit card for offers.

Find a science museum near you and prepare to be awed by all that you can learn there! I always learn something new and am inspired whenever I go to a science museum!

How do I start a science fair project?

What should I do after I have a science fair project idea?

How do I make a science fair board?

What is the scientific method?

What is the engineering design process?

Where can I find a science fair competition?

The www Virtual Library: Science Fairs website also has a collection of science fairs from all over the world, as well as national, state, regional, local, and virtual competitions!

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78 Exciting 4th Grade Science Projects and Experiments

Did you know you can make plastic from milk?

Nothing gets kids more excited for science than hands-on experiments! Watch your 4th grade science students’ eyes light up when they try some of these activities. You’ll find physics, biology, engineering, chemistry, and more. These projects are easy to set up and really help drive the learning home. Get ready for some science fun!

To help you find the right 4th grade science projects and activities, we’ve rated them all based on difficulty and materials:

Difficulty:

• Easy: Low or no-prep experiments you can do pretty much any time
• Medium: These take a little more setup or a longer time to complete
• Advanced: Experiments like these take a fairly big commitment of time or effort
• Basic: Simple items you probably already have around the house
• Medium: Items that you might not already have but are easy to get your hands on
• Advanced: These require specialized or more expensive supplies to complete

4th Grade Science Fair Projects

4th grade stem challenge science projects, 4th grade motion and energy science activities.

• More 4th Grade Science Projects and Experiments

These 4th grade science experiments also work well as science fair projects. Try changing up the variables to turn it into a real experiment, then form a hypothesis and find out what happens.

1. Blow unpoppable bubbles

Difficulty: Easy / Materials: Medium

A soap bubble you can hold in your hand? It’s true! A little glycerin makes the soap bubble layers stronger, so you can even toss them gently from person to person.

Learn more: Unpoppable Bubbles Experiment

2. Grow crystal names

No list of 4th grade science projects would be complete without crystals! Kids of all ages love growing crystals, making this an ideal way to learn about supersaturated solutions. The classic experiment gets a new twist when you have kids shape pipe cleaners into their own names first.

Learn more: Crystal Letters

3. Grow bacteria in petri dishes

Difficulty: Medium / Materials: Medium

Your students will truly feel like scientists when they perform this classic experiment. They’ll prep the dishes with agar, swab different surfaces, and see what bacteria they grow. It’s gross science, but it’s also easy and impressive.

4. See coastal erosion in action

Here’s a cool experiment to include in your unit on oceans. Build a miniature coastline, then see how wave action erodes the shore.

Learn more: Erosion Experiment

5. Erupt a lemon volcano

Difficulty: Easy / Materials: Basic

Early chemistry experiments with acids and bases are always a lot of fun. This one uses the natural acids of lemon juice and adds a little food coloring to up the wow factor.

Learn more: Lemon Volcano

6. Sink and float to explore density

Adding items like salt or sugar to water changes its density, as does the temperature itself. Turn this into a 4th grade science fair project by experimenting with different solutions and forming hypotheses about the results.

Learn more: Saltwater Density

7. Discover a density rainbow

Difficulty: Medium / Materials: Basic

Colorful, simple, and impressive: It’s the trifecta of 4th grade science experiments! Wow your students by layering colored sugar water as you learn about density, adhesion, and cohesion.

8. Transform milk into plastic

Plastic seems incredibly modern, but people have been making casein plastic from milk for centuries. In this 4th grade science project, students experiment to create the formula for the best milk plastic. They’ll be amazed at the results!

9. Simulate an earthquake

The ground under our feet may feel solid, but an earthquake changes that pretty quickly. Use Jell-O to simulate the Earth’s crust, then see if you can build an earthquake-proof structure for a practical and fascinating 4th grade science fair project.

Learn more: Earthquake Simulation

10. Test Sharpie solubility

Find out if Sharpie markers are really permanent with this 4th grade science project that uses the scientific method to explore solutes and solvents.

Learn more: Sharpie Solubility

11. Find out if mood rings really work

Watch this video with your students first. Then, apply the rigors of the scientific method to mood rings ! Find out what makes mood rings change color, then see if they really reflect a person’s mood.

12. Create a new plant or animal

Kids will really get into this project, indulging their creativity as they invent a plant or animal that’s never been seen before. They’ll need to be able to explain the biology behind it all, though, making this an in-depth project you can tailor to any class.

Learn more: Create an Animal & Create a Plant

13. Investigate decomposition

Yup, it’s gross … so kids will love it! Seal food items in a plastic bag and experiment to see what factors affect their decomposition, helped along by a heaping dose of mold.

Learn more: Decomposition

14. Assemble a lung model

With just a few supplies including balloons and a plastic bottle, you can make an impressive working model of human lungs. This makes a very cool 4th grade science fair project.

15. Explore the causes of tooth decay

They hear it from their parents all the time, but this experiment will prove to your students once and for all what can happen to their teeth when exposed to different drinks such as soda and milk. This is one of those classic 4th grade science fair projects every kid should try.

16. Test out different slime recipes

All kids love to make slime, so why not try out different recipes as a fun science fair project?

Learn more: How To Make Slime (4 Recipes + Printable Reflection Sheet)

17. Determine the iron content of cereal

This is such a simple (and fun) 4th grade science fair project. Select three different cereals, put them in three separate bowls, and then crush them into a dust. Then use a large magnet to determine if any of the cereals are magnetic. The most magnetic contains the most iron! Be sure to hypothesize which one has the most iron before starting so you can test it.

Learn more: Iron in Cereal Science Fair Project

18. Test out artificial fruit ripening

This 4th grade science fair project is easy enough to reproduce and the results may surprise you. Try out different methods of ripening fruit and hypothesize which will cause the quickest ripening.

19. Compare a DIY thermos with a store-bought one

Make a homemade thermos using a glass bottle, a plastic water bottle, aluminum foil, and tape. Then test out how it compares to a stainless-steel thermos at keeping water hot over several hours. Record your observations about the conditions of the bottle and the temperature of the water.

20. Test drying times for oil paints

This video isn’t specific to a science fair project, but it does briefly explain why certain pigments affect drying times. Start with a number of different oil paint colors and record what ingredients have gone into the different pigments. Next, hypothesize which will dry quickest to slowest and why. Finally, test your theory!

21. Discover ants’ dining preferences

This is such a fun science fair project, but be forewarned if you’re squeamish around bugs! Gather different forms of sugars and sweeteners and then lay them out near an ant pile. Record what you think will happen and then check back in and see how it compares to what actually happened!

22. Test music on plant growth

This 4th grade science fair project is a fun twist on growing plants under varying conditions. Be sure to be consistent with how loud and how often you play the music for one of the groups. You’ll also want to take photos each day and have someone who’s tech savvy create a time-lapse video.

23. Solar oven science project

A solar oven, also known as a solar cooker, utilizes the energy from sunlight to cook food. It works on the principle of converting solar radiation into heat energy. So how does it operate? Solar ovens are typically designed with reflective surfaces, such as mirrors or aluminum foil, which help to concentrate sunlight onto a central cooking area. These surfaces trap and focus sunlight, increasing the intensity of heat and cooking the items inside.

Try it: Solar Oven Science Project (Guide + Printable Reflection Sheet)

For students who love to tinker, STEM challenges can spark incredible 4th grade science fair projects. Here are some of our favorites for this age group.

24. Catch a dinosaur

Divide kids into groups and provide them each with a dinosaur, some large Popsicle sticks, and a bunch of binder clips. See who can build the best cage for their dino in a predetermined amount of time.

25. Make a wind anemometer

This is a relatively simple 4th grade science experiment that kids can complete to test how fast the wind is blowing.

26. Create a kaleidoscope

Kaleidoscopes produce mesmerizing whirls of colors and shapes, but they can also teach valuable lessons. Kids will learn about reflection and refraction and maybe even a bit about geometry.

27. Create an optical illusion

This is a simple way to teach students about optical illusions. First, challenge them to build a triangle out of LEGO bricks, and then see if they can make something that just looks like a triangle. Be sure to take photos to demonstrate how at just the right angle, they can trick even themselves!

28. Make a harmonica

Turn an engineering lesson into a musical one! Create homemade harmonicas using everyday materials to learn about sound vibrations and pitch.

29. Feel the force

If you have fans of Star Wars in your class, they will love this STEM project. All you’ll need is an LED, coin battery, a straw, and some tape. We can’t think of a better way to teach about circuits than by creating your own mini lightsaber!

30. Engineer a drinking-straw roller coaster

STEM challenges are always a hit with kids. We love this one, which only requires basic supplies like drinking straws.

31. Make a wigglebot

Who knew electricity could be so adorable? Explore the science behind batteries and motors by creating a simple “wigglebot.” Experiment with weights to throw the motor off balance and create fun designs.

Learn more: Homemade Wigglebot

32. Construct a working flashlight

You’ll only need a few supplies to guide your students in building their own LED flashlights. They’ll learn how electricity travels and the way circuits work. The slideshow available through the link makes this lesson a breeze for teachers too.

Learn more: DIY Flashlight

33. Build a hovercraft

It’s not exactly the same model the military uses, but this simple hovercraft is a lot easier to build. An old CD and a balloon help demonstrate air pressure and friction in this fun 4th grade science experiment.

34. Create a smartphone projector

No projector in your classroom yet? No problem! Have your students help you construct one for your smartphone using a cardboard box and large magnifying glass . They’ll learn about convex lenses and how the brain processes images too.

Learn more: DIY Smartphone Projector

35. Set up a pulley system

The science of machines never fails to fascinate kids. In this experiment, they’ll design their own pulley system to make it easier to lift an object.

Learn more: DIY Pulley

36. Design a working elevator

Engineering activities make for amazing hands-on learning. Challenge your 4th grade students to build an elevator that can safely lift a certain amount of weight.

37. Make a model seismometer

Explore the science of seismology and learn how scientists study earthquakes and their effects. This model seismometer is easy to build and fun to experiment with.

Learn more: Model Seismometer

38. Conduct an egg drop

Here’s one more classic to add to our list of 4th grade science experiments: the egg drop! The great thing about this project is that kids can do it at any age, with different materials and heights to mix it up. Hit the link below to get an egg drop project designed just for 4th graders.

Learn more: Egg Drop Challenge Ideas (Guide + Printable Reflection Sheet)

39. Demonstrate Newton’s laws of motion with balloon rockets

Who doesn’t love balloon rockets?! Your students will have a blast(off) displaying Newton’s third law of motion while learning about physics.

40. Baking soda volcano experiment

This experiment teaches kids about simple chemical reactions and physical properties. The best part? It’s easy to do and uses only a few basic ingredients.

Learn more: Baking Soda Volcano Experiment (Guide + Printable Reflection Sheet)

41. Elephant toothpaste explosion

This experiment works through a chemical reaction that results from a catalyst (potassium iodide, aka yeast) being introduced into a mixture of hydrogen peroxide and dish soap. The hydrogen peroxide is decomposed into water and oxygen and the catalyst speeds up the reaction, forcing the oxygen into the soap bubbles. The resulting effect is the substance quickly pouring up and out of the container.

Try it: Elephant Toothpaste Experiment (Guide + Printable Reflection Sheet)

Many 4th grade science standards include units on energy and motion. These energy science activities offer cool hands-on ways to spice up your classroom lessons.

42. Flick marbles to learn the transfer of energy

This experiment is a bit of a thinker: What will happen when one moving marble hits several stationary marbles sitting in a row? Flick the first marble and find out!

Learn more: Marble Energy Transfer

43. See energy transfer in action with sports balls

Place a tennis ball on top of a basketball and bounce them together to see how energy transfers from one object to another. This one is very easy, and kids will love seeing how high they can get the balls to bounce!

44. Go an on energy scavenger hunt

Emphasize the fact that energy is all around us in one form or another with this easy, free printable energy science activity. For a more advanced version, help students identify each kind of energy (kinetic, stored, heat, etc.) they find.

Learn more: Energy Scavenger Hunt

45. See a heat-powered windmill demonstrate convection

Heat rises, and its interaction with cooler air creates convection currents. Find out how we can put convection to work for us with this 4th grade science craft project.

46. Capture waves in a bottle

Here’s a quick and easy way to show wave action in a no-mess way. You don’t need to add a little ship to the bottle, but it does make it more fun!

Learn more: Waves in a Bottle

47. Assemble a wave machine

Turn this one into a class cooperative activity, or try it as a science fair project idea. Either way, it’s an incredibly fascinating way to demonstrate the energy science of waves.

48. Use a Slinky to demonstrate types of waves

A Slinky is more than just a toy—it’s also a terrific science manipulative! Use it to see waves in motion, both longitudinal and transverse.

49. Watch gravity beads prove Newton’s laws

You’ll need a loooooooong string of beads for this experiment. Make your own by taping dollar-store strings together, or buy a long bead garland . Pile them in a cup and get the beads going; it’s fascinating to watch inertia and gravity at work.

Learn more: Gravity Beads Experiment

50. Spin marble tops to learn about inertia

Glue together marbles in a variety of pyramidal patterns to form tops, then form hypotheses about which will spin best. Afterwards, kids will have fun new toys to play with!

Learn more: Marble Tops

51. Visualize the second law of motion with soda cans

Newton’s second law, concerning acceleration, force, and mass, can be a little hard to understand. This easy 4th grade science demo makes it easier to visualize.

52. Demonstrate a tornado

Create a tornado using just a few magnets and a cup of water. It’s not just cool either, as it teaches a valuable lesson on centripetal force.

53. Create a magnet-powered car

This project can be done at home or as part of a group in class. You’ll need to purchase some supplies including wheels, dowels, and magnets. It’s a great lesson on propulsion.

54. Experiment with a zip line

Provide your students with Popsicle sticks, elastics, paper clips, and more to see if they can build the fastest zip-line racer in the class. This is sure to be a hit with 4th graders!

More 4th Grade Science Projects and Activities

Use these cool science experiments to encourage a love of science, at home or in the classroom!

55. Measure a magnet’s attraction force

Fourth grade science students already know that magnets attract metal objects. In this experiment, they’ll measure to see how close a magnet needs to be to an object for the attraction to work. Mix things up with different sizes of magnets and objects of various weights.

Learn more: Magnet Measurements

56. See light refraction in action

This seems more like a magic trick, but we promise it’s science! Make colors seem to appear and disappear, change numbers into letters, and more.

Learn more: Light Refraction

57. “Draw” on water with dry-erase marker

This is another one of those mind-blowing science demos that kids will want to try over and over again. Draw on a shallow bowl or plate with dry-erase markers , then slowly add water. The marker (which is insoluble in water) will float to the top!

58. Paint with sunscreen

Prove that sunscreen really does provide protection from harmful UV rays. Turn this into a full-blown experiment by trying different SPFs or comparing it to other creams or lotions without SPF.

Learn more: Sunscreen Painting

59. Become human sundials

Choose a sunny day and grab some sidewalk chalk—your students are about to become sundials! They’ll practice measuring skills and learn about the movement of the sun across the sky.

Learn more: Human Sundial

60. Mine for chocolate chips

If you’re learning about mineral resources, this quick hands-on activity is an interesting way to explore the effects of mining. Kids have two minutes to find as many chocolate chips as they can in a cookie. Will they smash it up and destroy it entirely? Pick them out one by one? This experiment can lead to intriguing discussions.

Learn more: Mining for Chocolate Chips

61. Assemble an edible DNA model

Use licorice sticks, four different-colored candies or fruits, and toothpicks to build an edible strand of DNA. Learn about chemical bonds and the helix shape, then eat your creation!

Learn more: Edible DNA Model

62. Layer an edible soil model

Digging in the dirt is fun, but it’s even more fun when you can eat the dirt when you’re finished! Create edible soil-layer models, complete with gummy worms, for a simple earth science project. ( Find more edible science projects here. )

Learn more: Edible Soil Layers

63. Turn a penny green

Experiment with simple chemical reactions as you turn pennies green using vinegar. (Don’t forget to tell students that the Statue of Liberty is green for this very same reason!)

Learn more: Penny Reactions

64. Use marshmallows to explore Boyle’s law

Seeing Boyle’s law (which relates pressure and volume of gasses) in action makes it a little easier to understand and remember. This simple 4th grade science experiment uses marshmallows to make a great visual.

Learn more: Boyle’s Law

65. Form ocean currents

Learning about oceanography? Demonstrate how ocean currents form using warm and cold water (and a few plastic sea creatures for extra fun!).

Learn more: Ocean Currents

66. Understand the impact of non-renewable resources

This is a neat Earth Day activity . Discuss the differences between renewable and non-renewable resources, then have your class form “companies” to “mine” non-renewable resources. As they compete, they’ll see how quickly the resources are used. It’s a great tie-in to energy conservation discussions.

Learn more: Non-Renewable Resources

67. Explore blood components

Use simple kitchen supplies and candy to create a jar full of “blood” that includes plasma, platelets, red blood cells, and white blood cells. (You can even snack on the blood cells along the way!)

Learn more: Blood Model

68. Create cool colors with candy

Learn about diffusion in the sweetest way! Grab a bag of Skittles for this quick and easy 4th grade science project.

69. Wow them with glowing water

Your students will ooh and aah at the result of this exploratory way to show phosphors in action with a black light, different types of water, and a highlighter. The results of this experiment might surprise both you and your students!

Learn more: Glowing Water Experiment

70. Make a bottle rocket

Break the class into small groups and then have them work together to piece together the various parts of the rocket. It might be helpful to have the shapes pre-cut. This 4th grade science project is best done outside.

Learn more: Bottle Rocket Experiment (Guide + Printable Reflection Sheet)

71. Use apple slices to learn about oxidation

Have students make predictions about what will happen to apple slices when immersed in different liquids, then put those predictions to the test. Have them record their observations.

Learn more:  Apple Oxidation

72. Explore density with one cup

This experiment is similar to others on our list about density but utilizes just one glass. Begin by pouring syrup into the bottom of a glass and then adding water and finally cooking oil. This alone will amaze your students as the liquids separate due to their density. Finally, try dropping items of different weights into the glass.

73. Make a heart model

This is such a simple and fun way to teach kids about the human heart. All you’ll need is a glass, a red balloon, red food coloring, water, and a straw.

74. Experiment with magnetic slime

Slime is obviously a favorite science experiment for kids, but the addition of iron filings really takes this up a notch. Get some magnets and let kids experiment with the magnetism.

75. Make a model river

This one might take some time, so it could be assigned as an at-home project. Have them complete their own river bed while completing a unit on geography and topography.

76. Whip up some fluffy slime

What’s better than a slime recipe? A fluffy slime recipe!

Learn more: How To Make Fluffy Slime (Guide + Printable Reflection Sheet)

77. Turn milk into cheese

Turning milk into cheese using just vinegar is a brilliant way to teach young students about chemistry and chemical reactions.

78. Dissolve sugar

This experiment is a simple way to demonstrate solubility. The positive and negative parts of the water molecules are drawn to the positive and negative parts of the sugar molecules, thus resulting in the absorption.

Keep the STEM excitement going with these Fantastic Free 4th Grade Math Games .

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100+ Exciting 4th Grade Science Fair Project Ideas

Find easy and fun 4th grade science fair project ideas! These simple experiments and creative ideas will help young scientists learn and have fun at the same time. Perfect for sparking curiosity and excitement about science!

Science fairs provide an exciting opportunity for 4th graders to explore scientific concepts and showcase their creativity. These projects not only encourage curiosity but also foster critical thinking and problem-solving skills.

In fact, studies show that students who participate in science fairs develop a better understanding of scientific principles, enhance their communication skills, and boost their confidence. Engaging in hands-on experiments allows students to connect classroom learning with real-world applications, making science more enjoyable and relevant.

Choosing the right project can be both fun and challenging. It’s essential for students to select topics that pique their interest and align with their abilities. Whether it’s a simple experiment using household items or a more complex engineering project, there are countless ideas to inspire young scientists.

In this article, we will explore various categories of science fair projects suitable for 4th graders, tips for presenting their work, and guidance on how to navigate common challenges. By diving into these projects, students will not only learn valuable science concepts but also develop a passion for exploration and discovery.

Table of Contents

4th Grade Science Fair Project Ideas PDF

What is the best science fair project for 4th grade.

Choosing the best science fair project for 4th graders involves considering their interests, available resources, and educational value. Here are a few popular ideas:

• Plant Growth : Investigate how different light sources affect plant growth.
• Simple Machines : Build a lever or pulley system to demonstrate mechanical advantage.
• Chemical Reactions : Create a baking soda and vinegar volcano to explore chemical reactions.

The best project is one that excites the student and is manageable within the time frame of the science fair.

Engaging Science Fair Projects for 4th Graders

Here are some engaging science fair projects for 4th graders:

Spark Your Curiosity: Fun Science Fair Projects for 4th Graders

• Egg Drop Challenge : Design a structure to protect a raw egg from breaking when dropped.
• Homemade Lava Lamp : Create a colorful lava lamp using oil, water, and food coloring.
• Crystal Growth : Grow sugar or salt crystals and observe the process.

Science Fair Success: Top Project Ideas for 4th Grade

• Weather Station : Build a simple weather station to track temperature and rainfall.
• Solar Oven : Construct a solar oven and test its effectiveness in cooking.
• Balloon Rockets : Create and launch balloon rockets to explore principles of motion.

Importance of Science Fair Projects in Learning

Science fair projects play a vital role in learning for several reasons:

• Hands-On Learning : They provide practical experience in scientific inquiry.
• Critical Thinking : Students learn to formulate hypotheses, conduct experiments, and analyze data.
• Collaboration : Many projects encourage teamwork, helping students develop communication skills.

How to Choose the Right Project?

When selecting a science fair project, consider these factors:

• Interest : Choose a topic that sparks curiosity.
• Resources : Ensure you have access to the necessary materials.
• Complexity : Match the project’s difficulty to the student’s grade level.

4th Grade Science Fair Project Ideas

Here’s a list of over 100 great 4th grade science fair project ideas that are engaging and educational:

Life Science Projects

• Plant Growth : Investigate how different amounts of sunlight affect plant growth.
• Butterfly Life Cycle : Create a display showing the life cycle of a butterfly.
• Microorganisms : Grow mold on bread to study how it develops.
• Seed Germination : Compare the germination rates of different types of seeds.
• Insect Habitats : Observe and document the different insects found in your backyard.
• Human Anatomy : Create a model of the human skeleton using craft materials.
• Food Webs : Build a food web to demonstrate predator and prey relationships.
• Photosynthesis : Conduct an experiment to show how plants absorb carbon dioxide.
• Animal Adaptations : Research and present on how animals adapt to their environments.
• Frog Dissection : Study the anatomy of a frog and present your findings.

Physical Science Projects

• Simple Machines : Build models of simple machines like levers and pulleys.
• Magnet Strength : Test how many paperclips different magnets can lift.
• Static Electricity : Demonstrate static electricity using a balloon and different materials.
• Homemade Compass : Create a compass using a needle and a magnet.
• Density Experiment : Layer different liquids (like oil and water) to show density differences.
• Chemical Reactions : Create a volcano using baking soda and vinegar.
• Solar Oven : Build a solar oven and cook s’mores using sunlight.
• Sound Waves : Explore how sound travels through different materials.
• Balloon Rockets : Test how the amount of air in a balloon affects how far it can travel.
• Crystal Growing : Grow crystals using sugar or salt and document the process.

Earth Science Projects

• Weather Patterns : Create a weather journal and track weather changes over a month.
• Rock Types : Collect and classify different types of rocks.
• Soil Layers : Create a soil profile to show different soil layers and their components.
• Volcano Models : Build a model volcano and demonstrate an eruption.
• Water Cycle : Create a mini water cycle in a jar to demonstrate evaporation and condensation.
• Earthquake Simulation : Build a model to show how earthquakes affect buildings.
• Moon Phases : Create a model to demonstrate the phases of the moon.
• Fossils : Make fossils using plaster and everyday items.
• Erosion Experiment : Simulate erosion using soil, water, and a slope.
• Pollution Impact : Study the effects of pollution on local water sources.

Environmental Science Projects

• Recycling : Investigate how much waste your family recycles in a week.
• Plant vs. Plastic : Compare the growth of plants in soil vs. plastic containers.
• Wildlife Conservation : Research endangered species and present their habitats and threats.
• Composting : Start a compost bin and observe how organic waste decomposes.
• Water Filtration : Create a simple water filtration system using sand, gravel, and charcoal.
• Solar Energy : Build a solar panel model to demonstrate how solar energy works.
• Carbon Footprint : Calculate your family’s carbon footprint and suggest ways to reduce it.
• Pollinator Gardens : Design a garden that attracts pollinators and research its benefits.
• Air Quality : Test air quality in different locations using simple methods.
• Invasive Species : Research an invasive species in your area and its impact on the ecosystem.

Physics Projects

• Balloon Cars : Design a car powered by a balloon and test its speed.
• Paper Airplane Challenge : Investigate how design affects the distance a paper airplane can fly.
• Bridge Building : Construct a bridge using toothpicks and test how much weight it can hold.
• Sound Instruments : Create musical instruments and explore how sound is produced.
• Motion Experiment : Study how different surfaces affect the speed of a toy car.
• Force and Motion : Experiment with different weights and their effect on rolling objects.
• Friction Investigation : Test how different materials affect the friction of sliding objects.
• Energy Sources : Explore renewable vs. non-renewable energy sources.
• Pendulum Motion : Create a pendulum and measure how different weights affect its swing.
• Rube Goldberg Machine : Design a Rube Goldberg machine to accomplish a simple task.

Chemistry Projects

• pH Testing : Test the acidity of various household liquids using pH strips.
• Homemade Ice Cream : Make ice cream in a bag and explain the science behind freezing.
• Color Changing Milk : Use food coloring and dish soap to create a colorful reaction in milk.
• Invisible Ink : Write messages with lemon juice and reveal them using heat.
• Rust Experiment : Investigate how different conditions affect the rusting of metal.
• Sugar vs. Salt : Compare how sugar and salt dissolve in water.
• Density Tower : Create a density tower using liquids of different densities.
• Fermentation : Observe the fermentation process using yeast and sugar.
• Baking Soda and Vinegar : Experiment with different ratios to see the reaction’s strength.
• Natural Dyes : Extract colors from fruits and vegetables and test their dyeing properties.

Engineering and Technology Projects

• Catapult Design : Build a catapult and measure how far it can launch objects.
• Water Rockets : Launch a water rocket and investigate the best pressure for flight.
• LEGO Robotics : Build a simple robot using LEGO kits and program it to perform tasks.
• Electric Circuits : Create a simple circuit using a battery, wires, and a light bulb.
• Solar-Powered Vehicle : Design a small vehicle powered by a solar panel.
• Model Roller Coaster : Construct a model roller coaster and analyze the physics of roller coasters.
• Wearable Technology : Design a wearable gadget and explain its function.
• Smart Home Model : Create a model of a smart home and its energy-saving features.
• Video Game Design : Develop a simple video game using coding platforms like Scratch.
• Drone Delivery : Explore how drones are used for deliveries and create a model.

Creative Projects

• Science in Art : Create art that represents a scientific concept (like the solar system).
• Science Poetry : Write poems or songs about scientific concepts.
• Storytelling with Science : Create a storybook that explains a scientific principle.
• Science-themed Comic : Illustrate a comic strip based on a science topic.
• Interactive Display : Create a hands-on display that allows others to engage with your project.
• Science Video : Produce a video explaining a scientific principle or experiment.
• Poster Presentation : Design a colorful poster to explain a science topic visually.

Fun and Engaging Projects

• Bubble Experiment : Investigate what makes the biggest bubbles using different solutions.
• Scented Water : Create scented water and explore how scents affect taste perception.
• Taste Test : Conduct a blind taste test to see if color affects flavor perception.
• Color Mixing : Experiment with different colors of paint to discover how colors mix.
• Jellyfish in a Bottle : Create a simple model of a jellyfish in a bottle and discuss its biology.
• Lava Lamp : Make a DIY lava lamp using oil and water.
• Balloon Inflation : Explore how different temperatures affect the inflation of a balloon.
• DIY Slime : Experiment with different recipes to create slime with varying textures.

Community and Social Projects

• Local Ecosystems : Study and document the different ecosystems in your neighborhood.
• Community Health Survey : Conduct a survey on health practices in your community.
• Food Waste Awareness : Research food waste and present solutions for reduction.
• Water Conservation : Investigate how much water is used at home and suggest conservation tips.
• Recycling Education : Create an informational campaign about recycling in your school.

Miscellaneous Projects

• Magic Milk Experiment : Create swirling colors in milk using dish soap and food coloring.
• Invisible Forces : Explore the concept of gravity using everyday objects.
• Worm Composting : Set up a worm bin and investigate how worms help decompose waste.
• Homemade Weather Station : Build a simple weather station and track weather patterns.
• Shadows and Light : Study how shadows change throughout the day.
• Cell Models : Create models of plant and animal cells using craft materials.
• Mood Ring Chemistry : Explore how mood rings change color based on temperature.
• Egg Drop Challenge : Design a container to protect an egg from breaking when dropped.
• Floating Egg Experiment : Test how saltwater affects the buoyancy of an egg.
• Wind Energy Model : Build a small wind turbine and demonstrate how it generates energy.
• Heartbeat Rate : Measure your heart rate before and after exercise and analyze the results.

Most Popular Science Fair Project Ideas for 4th Graders

Here are some of the most popular science fair project ideas for 4th grades:

Plant Growth Experiment

• Question : How does different soil affect plant growth?
• Hypothesis : Plants in nutrient-rich soil will grow taller than those in regular soil.
• Experiment : Plant seeds in different types of soil (e.g., potting soil, garden soil, sand) and measure growth over a few weeks.
• Observation : Record height and health of the plants.
• Conclusion : Analyze which soil type resulted in the best growth.

Homemade Volcano

• Question : How does the amount of vinegar affect the eruption of a volcano?
• Hypothesis : More vinegar will produce a larger eruption.
• Experiment : Create a volcano using baking soda and vinegar in varying amounts.
• Observation : Measure the height of the eruption.
• Conclusion : Discuss the results.

Effect of Sunlight on Plant Growth

• Question : Do plants grow better with more sunlight?
• Hypothesis : Plants exposed to more sunlight will grow faster.
• Experiment : Place identical plants in different light conditions (full sun, partial shade, complete shade).
• Observation : Measure and record growth.
• Conclusion : Compare results.

How Does Temperature Affect Crystal Growth?

• Question : Do crystals grow faster in hot or cold temperatures?
• Hypothesis : Crystals will grow faster in warmer temperatures.
• Experiment : Grow crystals in different temperature environments (like a fridge vs. room temperature).
• Observation : Measure size and number of crystals.
• Conclusion : Analyze the growth rate based on temperature.

Last Minute 4th Grade Science Projects

Here are some last minute 4th grade science projects:

• Homemade Lava Lamp
• Mix water, oil, food coloring, and an Alka-Seltzer tablet.
• Observe the reaction.
• Balloon Rocket
• Tape a balloon to a straw on a string and let it go.
• Measure how far it travels.

Colorful Celery

• Place celery in colored water to see how plants absorb water.
• Observe changes over a few hours.

Top 10 Science Fair Projects for 4th Graders

• Plant Growth
• Volcano Experiment
• Crystal Growth
• Water Filtration
• Simple Machines
• Food Chain Game
• Insect Observation
• Sunlight and Photosynthesis

Choosing a Science Fair Topic

• Interests : Pick a topic that excites you.
• Feasibility : Ensure you have the resources and time to conduct the experiment.
• Guidelines : Follow any specific guidelines from your school.
• Questions : Think of questions you want to explore.

Hands-On Experiments for 4th Graders

Here are some hands-on experiments for 4th graders:

Easy Science Experiments Using Household Items

• Invisible Ink : Use lemon juice to write messages that appear when heated.

Fun Projects to Explore Biology Concepts

• Plant Growth Conditions : Test how different soils affect plant growth.
• Animal Habitats : Create dioramas that depict different animal habitats.

Creative Ideas for Physics Projects

Here are some creative ideas for physics projects:

Simple Machines: Building Your Own Lever or Pulley

• Project : Construct a simple lever using a board and a fulcrum.
• Objective : Demonstrate how levers reduce effort needed to lift objects.

Exploring Gravity: Fun Experiments with Dropping Objects

• Project : Drop different objects and measure their fall times.
• Objective : Understand the effects of gravity on various weights.

Engaging Earth Science Projects

Here are some engaging earth science projects:

Understanding Weather: Create Your Own Weather Station

• Project : Build a basic weather station using a thermometer and rain gauge.
• Objective : Track and record local weather patterns.

Exploring Rocks and Minerals: Collecting and Classifying

• Project : Gather local rocks and classify them by type.
• Objective : Learn about geology and the rock cycle.

Innovative Chemistry Projects for Young Scientists

Here are some innovative chemistry projects for young scientists:

Colorful Reactions: Creating a Volcano with Baking Soda

• Materials : Baking soda, vinegar, food coloring, and a container.
• Procedure : Mix ingredients to create an erupting volcano.
• Learning : Explore acid-base reactions.

Making Slime: Exploring Polymers and Viscosity

• Materials : Glue, borax, and water.
• Procedure : Combine ingredients to make stretchy slime.
• Learning : Understand the properties of polymers.

Fun Technology and Engineering Projects

Here are some fun technology and engineering projects:

Building a Simple Robot: Introduction to Coding and Robotics

• Project : Use a basic robot kit to build a simple robot.
• Objective : Learn the basics of coding and robotics.

Designing a Bridge: Exploring Engineering Concepts

• Project : Construct a bridge using popsicle sticks and test its strength.
• Objective : Understand basic engineering principles.

Tips for Presenting Your Science Project

Here are the tips for presenting your science project:

How to Create an Engaging Display Board

• Include : Title, hypothesis, materials, procedure, results, and conclusion.
• Visuals : Use images, graphs, and charts to enhance understanding.

Practicing Your Presentation Skills

• Rehearse : Practice speaking clearly and confidently about your project.
• Engage Your Audience : Encourage questions and discussions.

Common Challenges and How to Overcome Them

Here are some common challenges and the tips to overcome them:

Managing Your Time Effectively

• Plan Ahead : Break the project into manageable steps and set deadlines.
• Stay Organized : Keep materials and notes in a designated space.

Troubleshooting Science Fair Projects for 4th Graders Issues

• Be Flexible : If an experiment doesn’t work, consider modifying your approach.
• Seek Help : Don’t hesitate to ask teachers or parents for guidance.

Encouragement to Explore and Experiment

Science is all about exploration and discovery. Encourage students to think creatively and pursue their interests. Every experiment, successful or not, is a learning opportunity. Emphasizing the journey of scientific inquiry can lead to greater appreciation and enthusiasm for the subject.

Developing Your Experiment Step-by-Step

• Select a Topic : Choose something that interests you.
• Research : Gather information to understand your topic better.
• Hypothesis : Formulate a clear hypothesis to guide your experiment.
• Experiment : Conduct your experiment, recording your observations.
• Analyze : Review your data and draw conclusions based on your findings.

Inspiring Science Fair Project Ideas

• Magnet Magic : Explore magnet strength using different materials.
• Water Filtration : Create a simple water filter using sand, gravel, and charcoal.
• Solar Power : Build a small solar oven and test its cooking ability.

Displaying Your Project with Impact

• Location : Choose a visible spot for your display.
• Clarity : Make sure all text is legible from a distance.
• Engagement : Consider interactive elements to draw in viewers.

Tips for Science Fair Projects for 4th Graders Success

• Start Early : Give yourself plenty of time to complete the project.
• Stay Curious : Ask questions and seek out new information.
• Have Fun : Enjoy the process and embrace the learning experience.

Conclusion: Inspiring Young Scientists

In conclusion, science fair projects are an invaluable part of a 4th grader’s education. They foster curiosity, creativity, and critical thinking skills. 

By engaging in hands-on experiments, students not only learn scientific concepts but also develop a passion for inquiry and exploration. Encouraging young scientists to pursue their interests leads to a lifelong appreciation for science. 

As they present their projects, they gain confidence and communication skills that will benefit them in many areas of life. Let’s inspire the next generation of scientists by supporting their explorations and celebrating their discoveries.

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45 Great Science Projects For 4th Graders

By Beth Roberts | Last Updated May 4, 2022

As science concepts are constantly changing and developing, kids have to grow up learning them at a rapid pace. However, this may be a time-consuming and frustrating procedure for parents and educators. If you are looking for a fun way to help your young learner keep up with the latest scientific breakthroughs, then here are some great projects you can use during family time to stimulate discussion about the latest scientific discoveries. These 45 science projects for 4th graders will keep your child engaged all year long!

1. Transfer Of Energy

Collect some marbles! This simple transfer of energy science experiment is a wonderful method to illustrate how energy is transmitted from one thing to another. This exercise requires some thought: What happens when a traveling marble collides with numerous immobile marbles arranged in a row? Find out by tossing the first marble!

2. Volcano Science 

The volcano science project is one of the most popular science fair projects globally, and it’s easy to see why. It’s entertaining and simple. Make your model out of an empty bottle, some cardboard, a few old newspapers, and any other odds and ends you can find about the house.

3. Snow Volcano

Making a volcano is a traditional science experiment for youngsters that everyone should try. It mixes science education for children with the awe-inspiring effect of a snow volcano science experiment . However, the setup and cleanup might be time-consuming. This snow volcano is an easy-to-set-up and quick-to-clean-up winter science activity!

4. Melting Snowman Winter 

Children will like this melting snowman , in which they will melt the snowman utilizing a fascinating winter scientific experiment. This snowman activity for preschoolers is ideal for toddlers, preschool, pre-k, and even elementary school students who want to sneak in a fun winter project where they will make a snowman and then melt it using snow science experiments for kids.

5. What If There Is No Electricity?

Make this handy paper flashlight , and learn about basic electric circuit principles! This activity is an excellent experiment for children because it will undoubtedly bring the science of batteries to their attention.

6. Make A Super Cool Lemon Battery

This instruction on constructing a lemon battery is excellent for a quick science fair project, a really fun home science experiment, or a classroom science exercise that requires no preparation. An intriguing experiment, Lemon Power is one that you can try to replicate with various fruits. Which fruit is the most effective battery? Experiment and see what happens!

7. Melting Snowman Slime

With this incredibly glittery and goofy Melting Snowman craft activity , your children will have a BLAST! They will have to race against the clock to construct a cute snowman out of the snowman slime before the snowman melts back into a puddle. This is a fantastic snowman activity for children during December, January, and February. You have to try these basic winter activities for elementary school students if you want to succeed.

8. How Do Antacids Work?

In this project, students investigate the chemical reaction when water is mixed with effervescent antacid tablets. This hands-on lesson demonstrates how a material might behave differently when reduced in size to the nanoscale range. It’s interesting for students to see the difference in reaction time between an unbroken antacid tablet and an unbroken one cut into several pieces.

9. Science Project On Tooth Decay

Maintaining healthy teeth is critical for chewing food, which is necessary for digestion. Due to the critical nature of teeth, tooth decay can be a major concern. A scientific fair project enables students to demonstrate how tooth decay occurs and how it can be prevented. You’ll need numerous samples for this job, and you’re unlikely to have a collection of teeth. Do not be concerned. Eggshells are an excellent replacement, and you may obtain as many as you require.

10. Mice And Music

If you’re testing mice in a maze, consider testing mice’s response to music . It is, in fact, an excellent experiment that has been replicated numerous times in laboratories. Scientists seek to examine the impact of various musical genres on mice to make connections with children. REMEMBER that if you choose to utilize live animals in your science fair project, you must ensure that the animals are not harmed!

11. Exploding Snowman

Children will go crazy for these simple winter activities for elementary students, which they will want to repeat repeatedly! Children will utilize a few common household items to create the winter science experiment to produce a baking soda and vinegar scientific experiment. Prepare for exciting giggles as the snowman grows larger and larger until it POPS! Use this as a snowman activity for children during the chilly months of December, January, and February!

12. Make A Lemon Volcano

After successfully creating a lemon battery, I found a lot of lemons asking to be utilized in another great science experiment. Therefore, what did they do? A lemon volcano can be built! There are so many lemons in our pantry that we could create the rainbow’s most beautiful creation with them all. Consider this excellent technique to utilize those lemons!

13. Force And Motion Stations

Students in fourth-grade science already understand that magnets attract certain metal items . They will do this experiment to determine the minimum distance between a magnet and an object for attraction to occur. Combine magnets of varying diameters with objects of varying weights.

14. Homemade Lava Lamp

This project will take around 2 hours to complete, including the experiment and the writing of the report. Children will learn about the interaction between oil and water in terms of density, as well as the presence of hydrophilic and hydrophobic substances, by participating in this activity.

15. A Magnetic Primer Designer

How are scientists able to “replicate” DNA? They employ a technique known as Polymerase Chain Reaction or PCR. The critical component of this process is a short bit of DNA called a primer that adheres to the larger piece of DNA you wish to duplicate, called a template. In this Magnetic Primer research project , you will investigate how the amount of matches and mismatches in a primer affects its ability to adhere to, or anneal, the DNA template during polymerase chain reaction (PCR).

16. Make Frost In A Can

Making frost in a can is a simple science experiment that kindergarten students enjoy. Kids can do this frost experiment at home without becoming cold will delight them, children. For parents, teachers, and homeschoolers alike, this easy salt and ice experiment is a great way to teach children how frost forms in the winter.

17. Ice Salt And Water Temperature

We use ice to cool or maintain the temperature of our drinks. Nobody enjoys warm lemonade or drink, isn’t that correct? With this enjoyable, simple science for kids, teach children about the effect of ice and salt on temperature . This ice and salt experiment is quite easy to conduct and is ideal for encouraging children to investigate and think critically about their surroundings.

18. Growing Bacteria In Petri Dishes 

Are you looking for the greatest bacteria science fair projects that will truly impress your friends and family? Steve Spangler Science has a fantastic collection of bacteria culture ideas, hands-on experiments, and science fair projects for children! Our super-fun projects and bacteria culture experiments will allow your young scientists to witness incredible and memorable bacteria growth in front of their eyes — in a petri dish in their home or classroom!

19. Earthquake Experiment And Interactive

Set a plate of jelly on the table and then begin constructing a structure on top of it. Wobble the dish once the structure is complete so that the jelly rattles and causes the structure to collapse, showing the science of seismology .

20. How To Do the Light Total Refraction Trick?

This may be a magic trick, but we assure you that it is not! C reate the illusion of colors appearing and disappearing , convert numbers to letters, etc. The Zip Lock Bag Water Refraction experiment is a basic and straightforward but awe-inspiring experiment. Simply submerge the zip lock bag in water to remove the image. It does appear to be magical.

21. Fizzy Love Potion

This Valentine’s Day, bring science to life by including some hearts and a delightful WOW effect that will keep youngsters engaged and learning fun. This is a simple Love Potion valentine’s science project with a little extra zing because it is a chemistry science experiment. Thus, by incorporating these Valentine’s Day scientific experiments into your day at home or at school, you may add some learning to the Valentine’s Day theme.

22. Bridge Project

This initiative investigates the fundamental physics of bridges . The goal is for the student to understand which shapes are the most structurally sound through experimentation, as well as the fact that many elements are taken into consideration in the field of engineering and construction. Physics is applied practically in this project, taking place in a real-world setting.

23. Valentines Day Oobleck

Have your children ever attempted to play with Oobleck? Oobleck is an enthralling non-Newtonian fluid that possesses both liquid and solid qualities! It truly is an enthralling science experiment for children to investigate and play with. They created a Valentine’s Day science variation of Oobleck to provide a very enjoyable Valentine’s Day exercise for elementary pupils. Utilize this for your Valentine’s Day theme, scientific exploration of states of matter, or a fun Valentine’s Day idea.

24. DIY Hovercraft

This experiment has proven to be one of the most effective methods of proving the power of air time and time again. Create a floating hovercraft and learn about friction and air pressure as you go.

25. Floating Dry Erase Rainbow And Shapes

The following is yet another mind-blowing science demonstration that youngsters will want to perform repeatedly. Dry erase markers are used to draw on a shallow dish or plate, and then water is progressively added. This is because the marker is insoluble in water and will float to the top of the water!

26. Glittery Purple Valentine Slime

Within 5 minutes, you can put together this incredibly entertaining Valentine Activity. Make this Valentine Slime in minutes with only a few simple supplies, some of which you may already have at home. They are easily obtained from your local craft store, Amazon, or Walmart if you do not have them. Use this in conjunction with your creative Valentine’s Day ideas for kids.

27. Paper Airplane Science

Create your theory about paper aircraft , and then conduct your experiment to test that idea. This article will provide you with all of the information you require.

28. Sunscreen Painting

Do your children become irritated when you apply sunscreen to them? Alternatively, you might say no outright. Demonstrate that sunscreen does protect from dangerous ultraviolet rays. Make this a full-fledged experiment by experimenting with different SPFs or comparing it to other creams or lotions that do not contain SPF.

29. Gummy Bear Osmosis

Perhaps you’ve seen some of the interesting, basic scientific experiments available online, but one that caught our eye was testing osmosis using gummies . Jordyn C. Jordyn, one of our contributors, conducted this gummy bear osmosis experiment with her children. We’ll share her results below; however, if you want to do your experiment, here’s everything you’ll need.

30. Magic Milk

I enjoy simple yet meaningful experiences that encourage young children to investigate, explore, and marvel at the world around them. The magic milk scientific project should be simple, quick to complete, and have a fantastic WOW moment. This experiment using milk and food coloring satisfies all three criteria! At home, in the classroom, or at your homeschool coop, try this milk science experiment for kids’ fun Valentine’s Day activity!

31. Unpoppable Bubbles

Is it possible to hold a soap bubble in your hand ? Yes, this is correct! A small amount of glycerin makes the soap bubble layers more durable, allowing you to gently toss them from person to person without breaking them.

32. Crystal Names

A complete list of fourth-grade science experiments would be incomplete without mentioning crystals. Growing crystals is a popular activity among children of all ages, making it an excellent opportunity to teach them about supersaturated solutions. When you first shape pipe cleaners into the shapes of their names, the traditional experiment takes on a whole new meaning.

33. Does Mint Cool Things Down?

Mint is a perennial blooming herb that comes in a variety of varieties. It thrives in shaded, chilly, wet places. Numerous individuals appreciate mint’s mild, refreshing flavor. Mint-flavored gum, breath fresheners, and hard candies frequently advertise the cooling effect of mint by incorporating pictures of frost and ice. However, is this impression a result of the mint’s true cooling effect ?

34. Which Food Will Rot First?

It’s critical to communicate to your children that they don’t have to wait to realize their ambitions of becoming scientists; they can start right away in their kitchens. They only need to think like a scientist to succeed. The first thing they require is for them to begin with a question. My little scientists came up with the question, “ Which food will go bad first? ” Here’s how we went about trying to figure it out!

35. Newton’s Law

Newton’s First Law asserts that an object in motion will continue to move unless acted upon by an external force. Use a string of beads to demonstrate Newton’s Law of Gravity when the beads are pulled ever so little and then begin to fall out of a glass or other container.

36. Layered Liquids Density 

Are you trying to come up with a nice Valentine’s Day science project for February? When the layered liquids stack up in gorgeous Valentine’s day hues, the children will be amazed. This will be one of the most memorable valentine’s science experiments that they will ever participate in. This Layered Liquids Density exercise is a terrific approach to teaching children about density through a fun, hands-on, and visually appealing density experiment that they will enjoy.

37. Oil Spill Experiment

This oil spill exercise will assist you in gaining a better understanding of the negative impacts of oil spills on the marine ecosystem. We have all heard of oil spills and their devastation of Mother Earth and the marine life that depends on it. However, those who do not encounter these impacts firsthand are unaware of their magnitude.

38. Beach Erosion Demonstration

Where has the beach vanished? Have you ever observed how the coastline changes after a large storm? Why does the seashore have a different appearance? You’re observing the effect of coastal erosion, and you can now set up a beach erosion activity and demonstration to demonstrate to your children how it works. This simple and enjoyable ocean science exercise is certain to be a favorite with your children, as it incorporates hands-on learning!

39. A Ping Pong Catapult

If you were a member of a raiding army in the Middle Ages, a catapult would have been extremely useful for destroying castle walls. However, only if you could accurately aim it! You will experiment with catapult technology in this science project. With a rubber band-powered catapult, you will launch ping pong balls into the air. The catapult design makes it simple to measure and repeat the force with which the ball is launched and its direction, allowing you to establish the optimal catapult settings for reliably hitting the goal.

40. Leprechaun Rocks

When it comes to concealing their gold, leprechauns are cunning. It is insufficient to seek refuge at the end of the rainbow. As a result, even if you reach the end of the rainbow, you will not discover a gold mine. They’d never make it that simple. However, you may come upon some strange green rocks – leprechaun rocks if you look about. With this leprechaun rocks scientific experiment , you’ll discover the secret science of luring the Leprechaun to release their treasure.

41. Amazing Food Coloring Flower 

This simple Flower Science Experiment will teach children about the elements of a flower, the floral’s life cycle, and capillary action – all while engaging them in a wonderfully beautiful flower activity! Children will be able to paint flowers using this flower experiment – even turning white flowers into two-color blooms! This color-changing flower experiment is one of the most incredible kindergarten science experiments I’ve ever seen. Get started by printing out the free food coloring flower experiment worksheet.

42. Make An Anemometer

Using your very own anemometer, determine the wind speed ! Simple earth science is demonstrated using a garden contraption constructed of paper cups, tape, straws, a pencil, and a thumbtack.

43. Simple Geranium Photosynthesis

This SIMPLICITY photosynthesis project enables children to learn about photosynthesis visually. With just a few readily available supplies, you can do this plant experiment for kids in minutes. Your children will like learning and retain much more information about what they do than what they hear. And introducing your children to a world of inquiry, curiosity, and trial and error will prepare them for success in any endeavor they pursue in life.

44. Balloon Rocket

The balloon rocket experiment is an excellent example of a children’s science project that may be carried out at home, in the classroom, or at science fairs. It’s always enjoyable to work on science projects and learn about the research’s rationale. The balloon rocket is an excellent science experiment for 4th Grade Science Projects.

45. Make A DIY Weather Vane

As spring approaches, we observe various changes in the weather, making it an excellent time to investigate with some fun weather activities for kids and weather experiments for kids to help children learn more about wind, rain, clouds, and more! I’ll demonstrate how to create an EASY weather vane , a DIY compass, and additional weather topics that 4th students would enjoy. Therefore, get a few readily available materials and construct this handmade weather vane today.