Trying to figure out what this kid's toy from the dentist is. I tried to look for it online and the only thing that looked similar was a fidget toy/spring like this:
Except this is just a solid piece of plastic. I thought maybe it just needed to be pulled apart, but it broke in half when I tried.
Maybe it's a spring that somehow fused together? No idea what else it could possibly be.
The dentist is handing you over his 3D printer calibration test parts