Here's a quick and easy recipe for making your own fog machine for $5 worth of household objects: a candle, glycerin, water, a pop bottle, and a disposable pieplate.
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.