Your third grader will delight in learning about sound waves as he observes the different sounds created by tapping on glasses with varying amounts of water.

Here's a fun at-home activity that will help your child strengthen math skills using high and low temperature data, and become a master temperature tracker!

Every time a sound is produced it emits a sound wave. This experiment demonstrates how sound travels, using nothing more than a spoon and a string!

This surprisingly good glue recipe comes from common kitchen items.

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

When you see those sunscreen "protection levels," what does that really mean? Try this experiment to find out.

Science isn't ho hum anymore when it involves building catapults to teach your fifth grader about projectile motion.

Make water and clay play a little more scientific with this hands-on experiment that teaches displacement and shows how an object's shape affects its buoyancy.

Here is a quick experiment you can conduct at the playground to introduce or reinforce the concept of Newton's First Law, The Law of Inertia.

In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!

Show your fifth grade scientist how to create a siphon using two buckets, plastic tubing, and water. Watch her astonishment as the water travels uphill!

Sink or swim? Calculate the density of various fruits and vegetables using water and a kitchen scale.

Has your kid noticed how much bigger the moon looks when it's low in the sky? Here's an activity you can do to show them that it's just an optical illusion.

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.

In this 3rd grade science activity, you'll experiment with the little-known fourth state of matter: polymers! Mix borax with white glue and watch what happens.

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!

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

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!

Household items and a bit of imagination will create a CSI kit for your child to have investigative adventures with. Explore the world of forensic science!

Little scientists will make inferences about hearing loss, pitch, and frequency in this great science fair idea that puts the human ear to the test.

A simple science experiment exploring the physics of water pressure that's been amazing people since Medieval times.

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

A homemade lava lamp gives any room a retro flair. Find out how to make a homemade lava lamp, and learn some science too, with this educational activity.

This science fair project idea produces varying pitches of sound.

This experiment uses a yeast solution, liquid detergent, and hydrogen peroxide to produce an exciting reaction like no other!

Show your child how and why the microwave works, while demonstrating just how strangely foods can behave while inside the crazy cooker.

It's food. It's Thanksgiving tradition. And guess what: Cranberry Sauce is also science! Try our simple recipe/experiment.

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

This science fair project examines how tsunamis travel by simulating a tsunami moving around an island. You will generate a pretend tsunami in a swimming pool.

If your fourth grader is obsessed with all things glow-in-the-dark, then here's an activity that will really light up her imagination!