About this 3D model
Thanks to Brian Enigma who posted the OpenSCAD File to his Mario Questionbox (http://netninja.com/fun/mariobox/). I was able to modify it and add a thin filling for the questionmark. Size is 10x10x10cm Put a LED light into it and close the lamp with the top cover. I used a 9V battery block with a handfull of LEDs.