My son and I made a bunch of Fidget Spinners from Stainless Steel and aluminum:
Above: Our Steel one, painted in red and blue spinning.
Above: The Steel fidget spinner. To paint this, we let it spin, then hit it with spray paint. We painted it gold, and then red on one side, and blue on the other, which creates some fun coloring when spun.
Above: The fidget spinner prior to painting. The thumb rests were stolen from a broken fidget spinner bought from the store.
My son assembling them.
We carefully crafted the path to nest them together when cutting, to help maximize the material usage. This can be done by making one single path laid out with many parts in it. In our case, we actually made the part for a single path, but left the final traverse such that it would be in a spot to make the next part.
We used a 608 bearings ordered from Amazon.com for the inside (Quite a few fidget spinner parts can be found on Amazon or Ebay)