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

In this sound experiment children listen for differences as they tap on a bag of air, a bag of water, and a wooden block held up to their ears.

This science fair project idea shows how a vibrating object transfers energy to whatever it touches.

In this cool sound resonance experiment, learn about frequency and pitch, and use a tuning fork to calculate sound velocity in air.