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Solarbotics’ Marble Machine is a delightful perpetual-motion machine. Made of laser-cut plywood, a 1″ solar panel, and a toy motor, this kit has been endlessly spinning marbles on my desk for many years.
Solarbotics’ Marble Machine is a delightful perpetual-motion machine. Made of laser-cut plywood, a 1″ solar panel, and a toy motor, this kit has been endlessly spinning marbles on my desk for many years.