You know how you end up turning your phone in your hand when you are bored or nervous? Instead of your phone you can use this toy!

This is an easy print that requires no support or any other material. The rolling could be smoother if it had ball bearings but I didn't want to use any extra materials other than the 3D printed parts.

Tolerances are difficult to get right for everyone. What for me is a very tight and strong connection between two pieces, for other people with other printer, different filament and slicing settings may be not. So, if the small cap falls apart from the roller body, you can glue it together.

I uploaded two different sizes, a small one (85mm/3.3in height) and a bigger one (102mm/4in height) which is a 1.2 scaled up of the previous one.

I've now added a new version model with bigger tolerances, as it seems like some people were having issues with the original one, the fidget was not spinning properly. In my case, the original model spins perfectly but if you print the original and you find it does not spin well, you can print only the “body” part from the bigger tolerance folder, which is the part that I reduced the size a bit to have more separation with the rollers.