Ball Bearing Fidget Spinner

Check out my concave buttons for the skate bearing here: http://www.thingiverse.com/thing:2071591
And the triple sided version here: http://www.thingiverse.com/thing:2063397

Update:
I have just uploaded a second model which uses 1/2" (12.7mm) ball bearings instead of the 5/8" (15.875mm) ones if you prefer lighter weight or can't find the 5/8" ones.
Also, both models now require no super glue and instead everything just snaps in and is secure.

I stumbled upon Jim Skelton's videos on fidg