Slow fidget spinner - 6mm ball bearings

A slow fidget spinner.

Print then fill with 6mm ball bearings & fit a 608 bearing to seal; add two caps (e.g. http://www.thingiverse.com/thing:2108154). Slowly turn it and listen to the ball bearings gently click.

Two versions - one solid with two rings of ball bearings, the other with one ring and holes so you can see the ball bearings move. Both versions should print without support.

Video https://youtu.be/KgnWJTzhuzE (apologies for the terrible quality & focus).

Note: The 608 bea