Locomotive Piston Smoking Robot. Strange and unique new Metal House Japan prototype robot. Only 25 pieces ever made of Blue version and Red version. Robot is battery operated and functions with bouncing pistons in his chest, lighted dome, and blows smoke from his Exhaust Pipe as he walks! This design also has new arms style as well as rivet designs on front and back of head. Each Robot is hand assembled at the Metal House Factory in Japan to insure quality of function and design.