In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

What is elasticity? Students will investigate how this concept applies to bouncing ball physics by testing the bounces of balls made out of different materials.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

What chromosome combinations determine a fetus gender? Use probability to think about whether a sperm and ovum will create a male or female in this project.

The objective of this science fair project idea is to determine if sound travels best through the air, water or a solid.

Teach your first grade scientist the difference between liquids and solids using maple syrup.

In this science fair project, we'll use a liquid crystal thermometer to find out whether exercising makes a difference in people's temperature.

In this activity, your child will transform an egg into a glowing, bouncy "ball" that they can play with.

In this experiment you observe and determine how well your cat uses his whiskers to navigate through a maze.

In this science fair project, students will try to discover if test subjects can detect the presence of Monosodium Glutumate (MSG) in food.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

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

Young scientists will investigate people's preferences for saltiness, and make some inferences about genetics and diet.

Learn how to make a ping pong ball anemometerâa device used to measure wind speedâin this free science fair project idea.

This science fair project idea examines whether boys and girls differ in reflexes.

This recipe makes bubbles that not only blow up nice and big, but do tricks and experiments! How do you do it? It's not a secret, it's science!

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

The goal of this project is to create an exciting topographical map out of dough.

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

Check out this cool science fair project idea that models the behavior of the cold desert plants: xerophytes and halophytes.

This science fair project idea examines whether adding gelatin causes a solid to have a higher melting point and/or melt slower.

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

How does a compass work? What's a magnetic field? Kids will build their own compass at home to find the answers in this great science fair project idea.

Enter the buzz worthy world of bee watching and find out what time bees like to wake up!

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

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

How does distance affect the spreading of light? Kids see diffraction and the inverse square law of light in action with this great science fair project idea.

This science fair project idea explores the different properties & interactions of sugar molecules.

Kids will learn how to make a thermometer to to explore liquid density in this great science fair project. Which liquids are affected by temperature the most?