This science fair project idea produces varying pitches of sound.

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

Wondering how we know that air is there? Here's a quick and easy experiment that proves that air may be thin, but it's not too wimpy to block your shot!

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

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

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.

Give your budding young observers a chance to discover simple machines at use in their own home.

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

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

Your child will learn science and make a fun new malleable toy with this balloon sandbag science experiment.

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.

Show your child that the simplest ingredients (salt and water) can be used to illustrate the concept of density!

Believe it or not, images that are cast upon your eye's light-sensitive screen (called the retina) are upside down. Here's a fun, fast experiment to prove it!

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

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

Let your fourth grade chef mix up butter and sugar with scientific principles about different states of matter, and get delicious toffee, too.

Making your own glass cleaner is easy, effective and inexpensive!

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

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

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

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?

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

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