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

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

Are you ready to be a detective for science? Then get out your magnifying glass and start studying fingerprints!

This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.

These science fair experiments demonstrate the chemistry of rust and the oxidation process.

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.

Discover whether cold or hot water from the faucet will boil faster on the stove.

Is it possible to trick the forces of nature that make your bubbles round to create a square bubble?

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 simple heat transfer experiment is a great introduction to the concepts of heat transfer and conduction.

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

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

This science fair project idea determines which method of hand cleansing is the most effective.

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

In this science fair project, you'll make a "ghost" appear in a test tube, and learn about what happens when hot water and cold water interact.

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

This science fair project will help students learn about non-vascular plants, such as mosses.

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

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

Science fair project that examines condensation and the conditions needed in order for dew to form.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

Ever wondered how a plant drinks water? This science project will teach you how and help you create a beautiful floral display!

This classic children's game demonstrates how sound travels through air vs. through a solid.

Use pepper and soap to discover some fun facts about the properties of water.

This science fair project idea explores how length affects the weight a bridge can hold.

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

This science fair project idea demonstrates that plants give off water.

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

Kids construct a single fixed pulley system to learn how pulleys can make work easier in this cool physics and engineering science fair project idea.