Nebraska Fidget Spinner - Wingnut2k
Per a request, here's a Nebraska fidget spinner that I came up with. This spinner uses (3) 1/2" ball bearings and (1) 608 skateboard bearing. This spinner is about 3-1/2" in diameter overall.
I would heat up the print and ball bearing with warm water and the bearings will slip in.
EDIT: TY to Joie011 for providing me a picture of his print.