This R5J2 robot is made from a 1978 Kenner R2D2. It was just the shell of the body, and everything else was created by Randi Rain. There are three inputs and three outputs. The inputs are noise, light, and motion sensors. It hears loud noises, in knows when it’s dark, and it knows when there is movement. The outputs, or the expressions, are the mech droid sounds, the head moving back and forth, and a white LED light. The robot reacts to its environment. No batteries needed. It plugs in.