This wooden machine is a giant mechanical wonder, standing at more than 6 feet tall. It relies on potential energy, kinetic energy and gravity to have a steel marble go from the top to the bottom, and back to the top again, all in a repetitive motion. There are physical forces that prevent the machine from working forever, but even in its present form, the thing can go on for 24 hours.
Gizmodo and Crunch Gear
