Website: thingiverse
Author: walter
Price: Free Download
File format: .Stl 3d printable
Description:
Update 2018-04-21: Added two additional versionsI had no idea what this was for when I uploaded it. I didn’t think it would be useful for anything other than as a 3D print demo, I just made it to satisfy my curiosity. But if you check out comments below, guttyr discovered you can spin it up by blowing on it, and it can