During my minor Art & Technology at AKV | St. Joost I've been working on a prototyping box for Arduino. I've been using a lasercutter to make a layered box which could be built from the ground up. The measurements allow an Arduino Uno (or predecessor) aswell as a Mega to fit in.
At the top of the box there's a puzzle pattern that makes it possible to use different puzzle pieces for different uses to give the box a better look and feel and makes it look just that little better than the arduino with messy wiring all around. (you will find the vector files here soon)