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

The pinwheel is a simple toy that has been around for years and uses the wonders of the wind to spin it and delight kids of all ages!

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

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

Your child will do a fun science experiment using soap and pepper flakes to help understand the concepts of water molecules and the surface tension of water.

Popsicles aren't just for the summertime, this activity takes cold and turns it into a creative and tasty science experiment.

This science fair project creates a visual model of whatâs happening to sound waves as a car approaches and then leaves.

In this fun science fair project idea learn about universal solvents and solutes and find out the solubility of several common liquid substances.

Kids will conduct a cool limewater carbon dioxide test that can be performed with common household materials to learn about the chemistry of this common gas.

Try this chemistry experiment with your curious kid and get some "shocking" results!

Here's an interesting activity that will enable your child to make his own magnifier out of a drop of water

An hour glass, also known as a sand clock, keeps time. In this activity, your child will make her own sand clock and measure the time it keeps.

Here's a fun and simple activity to introduce your child to surface tension, and pull an awesome stunt in the process!

How does rust form? Kids will learn about the roles oxygen, water, and electrons play in rust chemistry in this cool science fair project idea.

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.

Here's a fun activity that will introduce your fourth grader to the concept of frictionless motion by constructing a hovercraft.

Using an empty tennis ball can and a swimming pool, you will determine if it's possible to have a conversation under water.

How does a kazoo, the strings of a guitar, or the speaker of a radio make sound? The purpose of this science fair project is to show how vibration makes sound.

This easy aerodynamics activity is a simple way to introduce kids to the scientific method.

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

Get your sense of humor ready for this fun science experiment that demonstrates the fundamental physics of air pressure.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Create a homemade pair of sunglasses with colored lenses to see just how light and color affect our sight! Use this fun project to practice science!

Here's a classic celery science experiment that uses celery and food coloring to demonstrate how plants absorb water.

These flying potato poppers make a cool sound, create a celebratory mood, and they can teach your child about the power of air pressure.

This balloon-powered car project is a great way for your kid to learn about energy and how it can be used efficiently.

This science fair project idea experiments with spinning color wheels and optical illusions.

Put your second grade scientist to work this Fourth of July with our colorful "liquid fireworks" project!

How does the size of a vibrating surface affect the pitch of a drum? Learn about drum size and pitch with this easy science fair project idea.

Give your child an introduction to food preservation by making and canning your own yummy, homemade pasta sauce!