Knurled circular fidget spinner

I think the whole fidget spinner thing is corny, but my kids are into them right now. I had a set of bearings on my desk, and for whatever reason I found myself spinning them as I work. So I gave in and designed my own, but I just wanted a disk. Nothing fancy.

This design uses pennies for perimeter weighting, because you can't get much cheaper than 12 cents for weights vs. $1 or so for three cheap bearings. The center bearing is a typical 608.

I also didn't like most of the caps I foun