We had a player piano in my house as a kid. My Dad bought it from Shakey's Pizza when they remodeled. Along with a score of piano rolls.

I pumped through Under the Double Eagle march endlessly as a kid. What a thrill to hear all that music come out of a piano through my effort!

Maybe if this guy's music robot was pneumatic and required a kid to pump the compressor, then it'd provide that same thrill.