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.

Find out whether putting something on top of a plant will inhibit its growth.

Do different types of oil mix or stack? Find out in this science fair project idea!

Find out which kind of bubble wrap fares best when put in impact.

Let your second grader pay homage to an ancient Olympic tradition with this modern day Olympic wreath!

Find out whether packaged seeds actually do expire in this new science fair project idea.

Before Twitter, birds were the ones tweeting, not humans. Have your child discover the magical sounds of nature while recording birds around his neighborhood!

In this science fair project, kids start a chemical reaction that will make a balloon inflate itself!

This science project allows students to study the psychology of happiness.

Encourage local wildlife to settle down in your backyard with this adorable bird nest craft.

Introduce your child to the amazing, almost magical phenomenon of static electricity!

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

Has your child ever asked you how a submarine works? Here's a simple bathtub project that will make for a hands-on answer.

Will increasing the amount of salt in water effect how slow or fast the water freezes?

This science fair project idea explores whether a plastic slinky works as well as a metal slinky when walking it down the stairs.

This science fair project idea explores which fruit molds the fastest.

Determine if gender affects the ability to identify different smells.

This science fair project idea demonstrates how air resistance contributes to denser objects falling faster than less dense objects.

Did you know your body is full of simple machines? This project looks at one of the third-class levers in the human body: your arm!

In this design challenge, your child will create a parachute for a small toy using typical household items.

Do you think heat can affect a plant's growth rate?

What's the science behind those out-of-sight roots? Find out if you can trick roots into growing in different directions.

Help your second grade scientist explore the timely topic of wind speed using a version of the classic Beaufort Scale.

Science fair project which determines if plants really do need water to grow, or whether they just need to be kept wet.

Does electricity move better through thick wires or thin ones? kids will conduct this classic electricity experiment for this science fair project.

In this project, all you need is a protractor to learn how to use the altitude of Polaris to find latitude on Earth. Polaris is also known as the North Star.

Gather some friends for a bubbly soda taste test do determine calories' role in your favorite drinks.

This science fair project idea examines which type of insulation holds in the most heat.

This science fair project idea explores the different properties of matter.

Take to the air with science by experimenting with helicopter seeds right in your own backyard!