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

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

This science fair project idea produces varying pitches of sound.

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

This science fair project idea produces sounds by creating vibrations using different objects.

The purpose of this science fair project is to build a basic radio.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

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

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

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.