Using a toy race car kids create a visual model of the Doppler Effect.

Kids will learn how to show the direction of magnetic field lines and create a permanent model using iron filings in this great science fair project idea.

This project explores whether plants can live and grow when "watered" with juice, soda, or milk.

Step into the fantastic world of colors with a project that explores what shade you -- and your friends -- like best.

This experiment has students record rat behavior to learn about the benefits of rats and research rat myths throughout history.

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

Is it a square or a circle? See if you can trick your friends with this zany science project!

Get down to the rubber with this science project that tests the effectiveness of different types of erasers.

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

In this cool engineering science fair project, kids learn how to build Hero's engine: an enlightening example of Newton's third law.

This science project challenges students to study deer behavior in their natural habitat- the feeding patterns, social behaviors, male to female ratio, etc.

This science experiment examines the role of fat in food, especially in making bread rise and whipping cream.

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

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

This science fair project idea's objective is to become familiar with items your family regularly throws in the trash.

Take a closer look at your furry friend (or the furry friend of a neighbor -- with permission) to discover if communication exists between cats and humans.

This science experiment has students test whether a snail moves faster on concrete or dirt.

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

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

When you rub a balloon on your head, your hair stands up; but is that true for everyone? Does hair color affect static electricity?

In this project, build an insect model that shows how the head, thorax, and abdomen fit together! Learn insect anatomy by constructing a paper mache critter.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

This science fair project examines how seeds hitchhike on animals and clothing.

Before you get ready for a delicious scramble or omelet, add a bit of science to your morning routine!

In this free science fair project idea, we learn about surface tension and how it can support mass—in this case, a floating paper clip.

This science experiment tests whether warm or cold water works best in making cut flowers last longer.

In this investigation, an oil spill is simulated in a jar to observe the damage that oil spills have on the ocean and ocean life.

In this science fair project, students use the streak test to tell minerals apart from each other.

In this experiment you will replicate the mummification process by making a hot dog mummy.

Science fair project which determines whether the size or the thickness of a piece of paper has an effect on how many times it can be folded in half.