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

In this activity, young learners will make a balance using a plastic hanger and weigh a variety of small objects using candy corn.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

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.

First grade science often covers solids, liquids, and gases. This silly science explores serious facts about the difference between all three.

Excite your fourth grader by recreating ancient Viking myths. This miniature longboat will explore the principle of water molecules expanding when heated.

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

Use reusable, recyclable materials--along with a dose of imagination--to build a castle with first grade geometrical forms.

Play this flashlight game with your child to teach him about objects that are transparent, translucent, and opaque.

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!

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

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.

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