Thanks to Michael Matteo for pointing us in the direction of this YouTube video showing a fidget spinner as an integral component of a modular synth.
The video's poster had this to say, "I saw a post online where someone took a fidget spinner and made a synthesizer module with it. I decided to try that myself on my own homemade synthesizer. After I built the module, I tried it out by making a quick dubstep-ish patch."
New PCM 80/81 Editing via the Electra One MIDI Controller
Budget French synth clone
Uses a unique ball and spring model
And more - three winners with prizes worth over £1000