I went the other way and 3D printed a small version with 12mm o/d bearings for my 3 year old son. His hands are a bit too small for standard ones and he found them frustrating. He was very happy ...

It had to come to this. For his entry into this year’s Hackaday Prize, [Sean Hodgins] created a persistence of vision fidget spinner. This isn’t just any PoV fidget spinner — this is the ...