Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Collect meteorite dust with a magnet in your very own backyard! The objective of this science fair project is to gather meteorite dust to study outer space.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

In this project, you'll build a model of the earth, complete with all seven continents and four major oceans.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

The goal of this golf science fair science fair project is to determine whether the temperature of a golf ball affects its elasticity and its rebound.

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

In this air pressure science experiment with a balloon and a jar, children will use heat to create a partial vacuum and suck a balloon into a jar.

In this plastic wrap science fair project, you'll learn about polymer permeability and find out which plastic wrap keeps food from dehydrating best.

Can a toy car determine the strength of a magnet? In this cool magnet science fair project, young scientists will learn how to measure the strength of a magnet.

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

This science fair project idea teaches how the gases and pollution in the air affect the earth's atmosphere temperature.

Start your toy engines -- this is going to be a fast and friction-filled race!

Spiders don't go to grocery stores or fast food chains to get their food -- they set up traps and wait for their food to come to them!

Learn about the role of Earth's rotation on the Coriolis Effect and hurricanes in this science project. Model the Coriolis Effect on a hurricane's direction.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

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

This science fair project idea investigates how magnetism can defy the force of gravity.

How do organic materials become soil? This science experiment measures what materials biodegrade.

In this science project, the center of gravity is explored.

In this free science fair project, build a star clock and learn how to tell time on a clear night by observing the big dipper!

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

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

This science fair project teaches students the differences between fruits and vegetables.

Learn how to tell time by the sun with this cool science fair project idea that tracks how the accuracy of a sundial changes over time.

This science fair project idea compares biodiversity between drops of water.

Make a backbone model to explore human anatomy and life science.

This science fair project idea investigates how color affects temperature.

This science fair project idea explores the egg's thin membrane.

This science fair project idea investigates whether air has mass and weight.