I was just looking at an old spinner I found and had an idea for a handheld spinner. It would probably be cylindrical, 2-3" in diameter with the dial at the top, buttons on the grip, and made of sturdy plastic. Overall it would be about the size of a PS2 controller and have a USB interface.
Has anyone or any company made anything like this? Would anyone be interested in buying one for say $25-40 if I could make one?