New 20 gear model: https://makerworld.com/en/models/153612

I set out to create one of the most versatile, complex, and clean fidget toys to challenge my design and print skills, and because I loved the concept of a 12 gear fidget spinner.

The model includes 49 parts, and functions perfectly if your printer is well dialed in.

The toy can be used in a number of ways. You can manually spin gears in one hand, or between two hands. You can pinch gears to spin the toy around in your hand, or spin the toy with two opposing gears. It's really quite fun, and serves as a good educational toy for kids as well.

Putting it together is simple enough. Each gear has a screw, a washer, and a cap. Pop the screw through the gear, a washer on the back, then screw it into the core of the model. Once you've done that, you can pop the cap onto the gear.