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.

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

Engineers in training can get started with this simple wheel-and-axle construction activity.

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

Get your hands on a concoction that breaks the rules about what's a solid and what's a liquid.

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.

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

In this activity, you'll not only make your own bouncy balls at home, but your child will also learn how polymers are made.

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.

This science activity will help your student explore the changes that occur to transform an egg from raw to soft to hard-boiled.

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

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!

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

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

Try the classic balloon-on-the-wall trick with your kid and watch static electricity in action.

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

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

Deck the halls with last season's Christmas lights for a spectacular and electrifying science activity.

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

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

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.

Ready for takeoff! Make science fun and teach about levers and fulcrums as your child sends buttons flying.

This is a quick, easy science fair project that conveys the idea of density to upper elementary students.

Set your young chemist up for an afternoon of science-fueled magic with a deceptively simple activity starring baking soda and vinegar!

This trick uses vertical and horizontal forces to help your child to push apart your hands apart, no matter how hard you try to keep them together!

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!

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.

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.

Let your young scientist explore a brave new world of sound with an experiment that just requires a handful of common household items.

Learn to solve a crime scene investigation using an important forensics tool: oblique lighting.