This classic children's game demonstrates how sound travels through air vs. through a solid.

This science fair project demonstrates the principles of reflection through simple experiments involving mirrors and light.

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.

This quick and simple preschool mirror activity will introduce your child to the science of reflection and light with a flashlight experiment and picture game.

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

This science fair project idea produces varying pitches of sound.

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.

This simple "how to make a water wheel" activity makes physics come alive for your child by demonstrating how different kinds of energy work.

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

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

Here's a fun activity to help build thinking skills in young first grade scientists, and to encourage them to have a blast exploring the mass and volume.

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