Harmonica
- Episode aired Sep 22, 2010
Thin sheets of metal are mounted on a 'plate' and vibrate to make sound. Gears and Wiz discover how drawing and blowing air over the metal reeds makes a sound.Thin sheets of metal are mounted on a 'plate' and vibrate to make sound. Gears and Wiz discover how drawing and blowing air over the metal reeds makes a sound.Thin sheets of metal are mounted on a 'plate' and vibrate to make sound. Gears and Wiz discover how drawing and blowing air over the metal reeds makes a sound.