The HEXBUG Crab is a robotic creature that will hide in shaded areas until a loud sound or exposure to light chases it out into the open. The Crab will change direction autonomously in pre-programmed intervals or in reaction to loud sounds. Batteries are included. Colors may vary. Dimensions: 4.5" L x 3.25" H x 4.25" W WARNING: Choking Hazard - Small Parts. Not for Children under 3 yrs.