Summary

This is an interactive novelty for the arrangement of gears.

Instructions

Gears created in InkScape, all other work done in TinkerCad.

3mm x 8mm neodymium magnets and a steel surface (I used a non-stick pizza pan) are required. A glob of hot-melt glue will secure the magnet in the recessed base of the mounting stud.

The gears fit very loosely on the studs; this is intentional. This allows the gears to rotate very freely.

The gear/stud assemblies can be very easily slid around and repositioned; print as many as desired. The extended center hub permits easy rotation.

I doubt that there is anything particularly original about this thing, but I hope that it can be an amusing diversion.

Simple GearToy