About this 3D model

One of my 5th grade students made a fidget spinner that requires no external parts (i.e. bearings). Just print in place, and it works great! View a video of it in action here: https://youtu.be/pypY34swJDo This object was made in Tinkercad. https://www.tinkercad.com/things/9PsVTm8b0TS