Art box with unique, random laser cut Voronoi diagrams on each face. Two sizes -- a small square one and a larger rectangular version.

Cut out of 3mm wood or acrylic and snap together. You can use my lace-maker and boxer scripts to generate your own unique designs if you want other sizes.
https://bitbucket.org/hudson/boxer/src/tip/lace-maker
https://bitbucket.org/hudson/boxer/src/tip/boxer