Creative Hobbies 1.5 Inch Round Clear Plastic Turntable for Wind Up Music Boxes, Pack of 12

Automated music boxes began as cumbersome sets of bells struck by hammers, but over the course of several hundred years they've evolved into compact devices like this one. I’m sure you know how it works: wind it up and it plays a tune. The melody is programmed on this rotating drum. The drum has protrusions, called pins, that pluck the teeth on the comb. The comb is a piece of steel with eighteen teeth. Each tooth is a note. Longer teeth are lower notes and shorter teeth are higher notes. The comb works like a multi-pronged tuning fork. In this high speed video -- slowed by 250 times -- the drum appears to not move, but you can see the teeth vibrate. The shorter tooth is vibrating faster than this longer one. These vibrations produce the sound. The teeth are like this saw blade, when it is longer, it produces a lower note when plucked, and when shorter it produces a higher note. Notice