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This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

How does a flashlight work? Kids will make a complete circuit and explore how voltage contributes to brightness with this science fair project idea.

Science fair project that examines the relationship between the size of a bubble and how quickly it falls. What is the correlation?

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This science fair project idea explores how far the average human can see.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?

How do animals keep warm? In this experiment, find out whether fat insulation resists cold temperatures and learn how this works in the animal kingdom.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

Kids learn how to make a simple electric motor in this great engineering science fair project that teaches them how current generates its own magnetic field.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

How do icicles form and what do they look like? Do this free science fair project and watch the formation of icicles occur right before your eyes.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

Kids will learn how to clean fish tank the natural way. Add catfish to the tank and see if your water gets cleaner.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

This project explores how and how much one family can reduce the amount of garbage they accumulate over a three month period.

This experiment will determine how different kinds of light affects the strength of bakerâs yeast.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

How does mold grow? Kids find out by testing different conditions to measure mold growth rate and learn about what factors cause mold to grow more quickly.

This science fair project explains the process of how the lungs expand and contract with the help of the diaphragm.

This study evaluates if electronic devices commonly found in most households emit radiation, and if they do, how much?

For this science fair project, kids will learn how to make a lemon battery. They can conduct this classic experiment using readily available materials.

Check out this cool and free middle school science fair project idea on how to make a solar oven.

Slime: It's oozy, it's goopy, and it's just plain fun! Learn how to make slime with this fun science fair project.

In this free science fair project, learn how to separate salt from water using heat. A great science project for elementary school kids.

How can Hooke's law explain how springs work? Learn about how Hooke's law is at work when you exert force on a spring in this cool science project.

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

In this physics project, you'll learn how to find the maximum height of a projectile using some math and trigonometry.

Explore how dielectric heating comes into play when microwaving various liquids in this science project. This test will help you understand how microwaves work!

This experiment explores how microwave radiation affects fungi, bacteria, and plant life.