Base: legos Outputs: two lego motors and three LEDs Inputs: two phototransistors and two bumper switches Brain: OOpic Functions: Seeks light Power Source: 1 9-Volt battery Width: 6.5 inches Length: 7.5 inches Height: 5 inches Problems: programming stuff. (ARG!) Got them fixed 'though. Time to build: 1 day Cost: $50 for the OOpic Email: nic8759@hotmail.com