The USB Kitty stands (okay, crouches) about 4 inches high, bobbing its head as it demands attention, much like a real feline prima donna. Using a handful of sensors, the device also meows ingratiatingly when you make kitty-stroking motions near its chin. The Kitty is just like a real pet, only with a timer, an alarm, and a repertoire of cat-language birthday songs. At least you don't have to clean a litter box.