5 Penny Fidget Spinner
I used Fusion 360 with my son to design this fidget spinner. Fits 609 bearings (0.866" diameter) and pennies (0.75" diameter). I find 3 per penny hole works well, and weighing them to balance them out is helpful. I also have caps, which I'll post shortly.
I found that calibrating my extrusion multiplier in Repetier host really helped me fine-tune the hole size. I finally got it to where the bearing is a press fit that doesn't require a vise to press in place. I will also upload a test object I used to test bearing fit.