Official Thingyz Fidget Spinner

My son has been having fun making and selling fidget spinners at his Middle School. My wife made a customized design for him in Inventor Pro. We like it. Nice shape, good feel.

We found these ceramic spinners for the middle spinner: https://www.amazon.com/gp/product/B015RP8FW2/ref=oh_aui_detailpage_o01_s01?ie=UTF8&psc=1
We used soap and hot water to degrease them, afterwards we get about 55 sec of spin time. Out of the box we get ~30 seconds with them. Much better than the metal ones.

Fo