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Published on Aug 23, 2009
This is a wooden marble machine. It is 6 feet tall, and is powered only by potential energy, a little kinetic energy and gravity. there are no motors, batteries or cranks. It uses a 3/8 inch diameter steel marble, which starts at the bottom, and goes to the top, and then returns to the bottom,making this trip about 1,300 times in 24 hours.