Puzzle Ring

A puzzle ring: its designed to be printed in four separate parts, in four separate colours, each a little ring with tabs that click into each other. The tabs are positioned so there is a unique way of arranging the pieces (like a puzzle). It's not that hard to solve or anything. I made it in OpenSCAD. It's pretty much just a series of cylinders with holes, and the tabs are just rectangular pegs and cutouts.