In this windmill model science project, you will build a windmill to learn about wheel-and-axle machines and how these simple machines are used to do work.

What heats up fasterâwater or soil? 5th grade students test the specific heat of water against the specific heat of sand in this great science fair project.

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

Plants and light seem to be good buddies, but how far does the friendship really go?

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

Will potatoes spud or sprout faster in dry, dark, or cold conditions? Find out in this science fair project idea!

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Check out this fun and easy science fair project idea on germination of a seed and learn to identify exterior and interior parts of a bean seed.

This science fair project idea determines what household items are good conductors of electricity.

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 easy and inexpensive paper towel science project introduces kids to important physical concepts like cohesion, adhesion, and capillarity.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Most people assume that cold water freezes more quickly, but could that be false? Does hot water freeze faster than cold water? Let's find out!

This project determines whether Styrofoam, paper, or plastic cups are best for preventing ice from melting.

This science fair project idea investigates emulsifiers that allow oil and vinegar to mix.

Have you ever noticed the ridges on a dog's nose? In this project, we take several dogs' nose prints and discover just how unique they are!

Discover how and which salt melts ice the quickest.

How do series and parallel circuits work, and which produces the brightest light in a light bulb? Construct both in this project and find out!

This project examines if computer screen and text color affect retention and if people subconsciously prefer combinations of colors that help their retention.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

This science fair project idea discovers which brand of bubblegum produces the largest bubbles.

Understanding absorption means understanding why certain fibers and materials can absorb water! Kids will see absorption in action in this simple project.

This science fair project idea determines if the color of light affects the growth of plants.

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

Check out this cool science fair project on identifying rocks and minerals for kids.

Kids will learn how to make a steam powered rocket boat, also called a putt putt boat or a pop pop boat, in this great science fair project for 4th graders.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

How do the phases of the Moon and gravity cause spring tides and neap tides? Does the Sun play a role in the tides? Figure it out in this fun science project!

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.