According to Wikipedia, the first electrical motor was a homopolar motor. "Its operation was demonstrated by Michael Faraday in 1821 at the Royal Institution in London." I have to admit I'm with Insane Clown Posse on how they work, but you can easily make one at home with a few simple parts, as shown in this video by DaveHax. Read the rest

https://boingboing.net/2020/02/28/how-to-make-homopolar-motor-wi.html