Kinekt's geared fidget rings are really fun-looking jewellery. Designed by Glen Liberman and made from stainless steel, the $165 rings are a sweet bit of ornamental precision machinery.
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.