I saw a cool desk toy. It consisted of identical joints that alternated axis rotation that moved in interesting ways and made semi-geometric shapes or just chaos. So I decided to create it modifying the joints of the toy robot tool kit.
Version 1 kept here for historical purposes.
Version 2 consisted of turning the pieces 90 degrees so the knob wasn't printing straight up, but this meant shortening the hole. An optional plug was added to fatten it back up.
Version 3 More tweaking
Version 4 works. Use it.
1. Print DeskToyV4-4Plate.stl 3 or 4 times each in two different colors or use a multiplier (so 24 or 32 joints each).
2. Assemble in alternating colors. Put the pegs into the joints. A little glue may be necessary to keep them in.
3. Link the start to the end.