While they are peeing, the two figures move realistically. An electric mechanism driven by a couple of microprocessors swivels the upper part of the body, while the penis goes up and down. The stream of water writes quotes from famous Prague residents.Link (via JWZ)
Visitor can interupt them by sending SMS message from mobile phone to a number, displayed next to the sculptures. The living statue then 'writes' the text of the message, before carrying on as before.
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.