From the youtube account of Ronald Walters, an annotated video of a “marble machine" in the style of Rube Goldberg

This is intended to be an awkward, overly complicated mechanism for the sole purpose of entertainment and to make noise in the process. People seem to enjoy watching gears turn and marbles running around in circles making noise.

There are 16 gears hand-cut from ½” Baltic Birch plywood driven by an electric gear reduction motor.

Would love to see this in person. It’s pretty mesmerizing. Also: gears!