Fort Magic is a kit for building fabric forts; Tinkertoy-like connectors and rods are combined to make a frame that you can stretch blankets over to make elaborate, cool, fun play-forts -- teepees, airplanes, castles, etc.
I write books. My latest is a YA science fiction novel called Homeland (it's the sequel to Little Brother). More books: Rapture of the Nerds (a novel, with Charlie Stross); With a Little Help (short stories); and The Great Big Beautiful Tomorrow (novella and nonfic). I speak all over the place and I tweet and tumble, too.