Action & Reaction Sound Track Building Set
$22.99
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Physics has never been so astonishing! A truly unique supplement kit with 5 special musical tracks to create ball runs with a decidedly original effect! The musical tracks have special plates that, when struck by the ball along the route, play different notes like a real xylophone! Build your circuits and defy the laws of physics... your imagination is boundless and so is Action and Reaction!
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