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.

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.

This science fair project idea produces sounds by creating vibrations using different objects.

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

Amaze your kids by separating a salt and pepper mixture using an "electric spoon" charged with wool.

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

This 4th of July, explore fourth grade science and make some safe fireworks in your own backyard using soda pop!

Have your child build his own mini waterfall, and help him develop his planning, problem solving, and architectural skills.

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

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

Help your child get a grasp on what it was like to build gigantic ancient structures with this easy engineering activity about science and physics.

On the next chilly, winter day, invite your fifth grader to make a hand warmer by experimenting with the loaded combination of a few natural ingredients.

In this fun activity, your child will create their very own solar oven to bake s'mores!

Science fair project that examines what causes thunder and why a thunderclap sounds so loud. How is lightening related to the creation of sound waves?

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Take a look at forensic science with your child. She'll learn how to take a shoe impression, just like the detectives do!

Would your child like to learn about a hidden world? All she needs to do is open her box of markers!

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

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

What is it about a Slinky that causes it to walk down the steps? This simple experiment is a perfect illustration of both gravity and momentum.

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

This science fair project idea produces varying pitches of sound.

Your kid can learn about the process of making frozen yogurt and enjoy a homemade, flavorful dessert. Experiment with this fun, chilly food!

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

Chemistry isn't just incredible ... sometimes its edible! These crystal lollipops are a delicious introduction to chemistry concepts.

This science fair project idea explores whether talking to a plant will help it grow.

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

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.

Explore the chemistry of latex polymers with this outrageous, hilarious science activity.

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