Exploring some mechanisms based on bevel gears, with Sabetta Matsumoto. These are our interpretations of some reasonably well known designs. The earliest Gear cube I am aware of is this one, uploaded by Emmett Lalish: https://www.thingiverse.com/thing:50716 The earliest Brain gear I know of is this one, uploaded by mappum: https://www.thingiverse.com/thing:1532 Our versions are available to print yourself and assemble with bolts here: Gear cube: https://www.printables.com/model/310705-gear-cube Brain gear: https://www.printables.com/model/315255-brain-gear