This is a set of movable nested rings a la Armillary spheres or perhaps the film Contact. One touch and they start spinning, showing gyroscopic forces. Also functions as a trivial demo of gimbal mechanisms.
The tolerances of the moving parts vary based on printing method and variables during the printing. To improve the motion, cut out a tiny circle of thick paper and put it in the axle well.
6.226 w x
3.456 d x
2.451 w x
1.361 d x