This is one of the ways I see a fidget spinner: simple design and proper colors.
Easy to print with no supports, this triangle spinner is assembled by press-fitting all the parts together. I used white and red as colors because I like the contrast and it reminds me of dishwasher tablets.
As usual, I'm happy with standard prusaslicer settings. In my case, I used a 0.30 mm layer height with no supports and no brim.
Have Fun printing and let me see what colors you choose for your one!