Why don't Rubik's cubes fall apart?

Explaining (one version of) the mechanism inside a Rubik's cube. It would be far cheaper to just buy a Rubik's cube and disassemble it, but in case you want to buy one of these 3D printed mechanisms, you can get the parts here: Faces and core: https://shpws.me/T4WN Edges: https://shpws.me/T4WQ Corners: https://shpws.me/T4WR You can also download the files from https://www.printables.com/model/2010... and print the parts on your own printer.