Ball Fidget Spinner

myminifactory

This spinner uses a standard 608 skateboard bearing in the middle hole, and 14mm steel ball bearings as weights that can be easily pressed in by hand. Print two of the caps to place inside the center - if they're too tight, scale them down a few percent and print again, or just glue them if they're too loose. You can also create custom caps at this link: https://www.thingiverse.com/thing:2083000. I've included a smaller 2-ball version of the spinner specifically designed for kids' hands since the larger 3-ball version was found to be too big.