Song on a watermelon keyboard

I'm not sure what the "Playtron" is, but it appears to be a controller that, combined with a synthesizer and conductive objects (in this case, fruit) you can play music. The instrumentalist is Mezerg, a "one man band" who plays other instruments, like the theramin, on his channel, 

Beyond this I know nothing, but thought it was cool for soeone to play music on slices of watermelon. If you want to see the controller, or buy one, the link is below, in the YouTube description