This is a simple remix of pkobayashi's fat-hinged fidget cube.  The structure hasn't been changed, I just laid the cubes out flat to make printing easier.  Printing the original model always resulted in the top layer of cubes getting fused to the bottom layer.  This layout eliminates that problem.
The fat hinges are quite robust, so the cube really stands up to a lot of "fidgeting" - it's quite addictive and oddly therapeutic.
UPDATE 02/2017: Got dual extruders or multi-color/multi-material capabilities?  Check out my dual extrusion remix.
UPDATE 04/2017: Updated the model (v1.1) to fix one of the hinges that was very slightly mis-aligned