Just a quick little spinner that I designed. It is very easy to print. Just 2 pieces in one file. Print them together, not separate. This doesn't spin perfectly, it depends on how good your printer is. I printed in PLA with 0.4mm layer height, with no supports, no rafts, no brims, and got a semi-great spinner.
The 'small finger' is for people with smaller fingers and has less of a hole in the middle.
The 'large gap' is for a larger gap between the midde piece and the outer piece.