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9 of the craziest things made of wood

By: Shea Gunther on Nov. 22, 2010, 12:44 p.m.
wooden machine with marbles and moving parts

Photo: YouTube

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Marble machine

Let's be honest: this machine doesn't actually accomplish anything practical, but it sure is fun to watch. Designer and woodworker Matthias Wandel built this machine in 2000. It's made mostly of wood and comes with the dual (green) benefit of being human-powered — just turn the crank and watch the marbles tumble.