It's a real-world question mark block! Will it contain coins or a power up? Ok, well, neither actually - just some custom electronics designed to make the bottom capacitive-touch sensitive. When you punch - er, touch - the bottom, the light toggles on and off and plays the classic "coin" noise. Once in while, though, you might find that you get something... extra.Check out this video of the lamp in action: http://www.youtube.com/watch?v=J05lAg8_1zYI designed this in OpenSCAD and cut it out of several colors of acrylic. I'm going to post the scad file as well as the Eagle PCB design and the firmware once I have cleaned those up a little. In the meantime, if you must have one, you can buy a kit from our Etsy store: http://www.etsy.com/listing/90652319/super-mario-inspired-touch-sensitive