This non-solder robot features a radical walking style, a light sensor beam, and the ability to avoid interference. The SPIDER III judges by the reflection of its light sensor rays whether there are obstacles, and then gives signals in the form of electric pulses to alter the rotating direction of the left side motor. It requires 2 AA batteries and 1 9V battery (not included). OWI “kits incorporate the basic principles of robotic sensing and locomotion, and guarantee an adventure that’s exciting, challenging, educational and fun,” President Craig Morioka of OWI Inc. told TDmonthly.