"Skittering" and "scuttling" are words the HEXBUG Scarab's maker uses to describe its movements. This brightly colored toy runs and jumps a lot like a real six-legged bug, and its does so really, really fast. Scarab's creators, Innovation First, decided to rely on mechanics instead of programming and sensors, in designing its actions. The Scarab XL version, a remote-controlled bug, moves its legs back and forth 1,200 times a minute using a motor and 16 gears. By making the legs slightly different lengths, the robotic bug has more random and lifelike movements, including not-entirely-straight directions and unexpected left or right turns. It can also right itself if it gets turned upside down. Scarab XL measures 3.5" x 7" x 4.75", weighs 10 oz, and requires 3 AA batteries plus a 9V battery for the remote.
(Source: Innovation First)