Spider III Robot by Elenco is a robot building kit for older children who enjoy working with electronics. Follow the instructions and build the intelligent robot with its radical walking style. This robot avoids interference by emitting an infrared beam which detects obstacles in its path. Spider III Robot then sends command signals in the form of electronic pulses to alter the rotating direction of its motor to evade these obstacles. Spider III Robot requires a 9V battery and 2 AA batteries.