Characteristics
Rolling ball sculpture art typically includes rails or tracks made of metal or wood, and one or more balls or marbles that travel down the tracks. Ball types include, but are not limited to, steel, acrylic, wood and glass. Rolling ball sculptures are often described as being both busy and soothing at the same time. They are an artistic form of mechanical motion.
Rolling ball sculptures rarely use circular-cross-sectioned tubes for the runs; tubes can induce balls to spin in ways that can introduce unpredictable delays; because of this, most sculptures use parallel guide rails on either side of the ball.
The largest rolling ball sculpture in the world, at 22 metres (72 ft) tall, is said to be the Energy Machine, located in the Hong Kong Science Museum in Hong Kong.
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