What a cool application of steam power. The perfect super retro project!
Armatron was my favorite toy as a kid, it was made by Tandy, and sold through Radio Shack in the 80’s. It was made with ONE electric motor, with gears and clutches throughout the entire base and arm, controlled by 2 joysticks that engages and disengages gears for 6 degrees of movement (the joy stick each move in 2 axis, plus they twist for closing/opening of the jaw, and rotating of the hand). This complex machine is a marvel of engineering, the amazing control and ease to operation made this toy amazingly fun to play.