This is ridiculously expensive ($35, plus S&H), and ridiculously awesome. It's a USB powered desktop cannon. Three foam projectiles (adhering to a human cannonball theme) are included, as is the software allowing the cannon to be aimed using the arrow keys on your keyboard. Judging from the pic at left, it looks to be about 6 or 7 inches tall. I'm just giddy at the mere existence of this thing! What could be more excellent! At last, you can mount the attack (really more of a pre-emptive defensive move) on the neighboring cube, and earn yourself the lebensraum you really need.