Well, they basically make a record player. The main idea is to teach them about recording sound, but hopefully they'd also see that you need motion and an amplifier to make the sound heard.
It's almost inconceivable to write a prehistory of music because Edison invents the phonograph in 1877 and prior to that, we have no record of any sound.
Friedman, who buys and sells Steinways, purchased the piano last year, and said he was surprised by the tooth marks left by the inventor of the phonograph, a music playing device.
At his laboratory in Menlo Park, he created many important inventions, like the light bulb, the telephone, and the phonograph, a machine that can record and play back sound.