The latest bizarre invention from Simone Giertz, the woman once known as "The Queen of Shitty Robots," involves a basic MIDI keyboard and a bunch of those creepy plastic wind-up teeth. The goal was to kind-of try to make each tooth-chatter correspond to a different pitch, so as to actually produce something that sounds sort of musical. That's not exactly how it worked out in the end, but the journey is itself a kind of delightful joke shop gag for analog synthesizers.
Also, this Wired feature on Giertz is absolutely worth the read, even if you haven't been following her strange shitty robots for years.
Why the 'Queen of Shitty Robots' Renounced Her Crown [Lauren Goode / Wired]