Da Vinci Rolling Ball Timer - Da Vinci Machines Series Kit by Academy #18174
Da Vinci Rolling Ball Timer - Da Vinci Machines Series Kit by Academy #18174
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Da Vinci Rolling Ball Timer - Da Vinci Machines Series Kit by Academy #18174

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Leonardo da Vinci Time-measuring device with the motif of escape sketch. Understand the structure of mechanism that works organically, reproduce seesaw motion using rolling ball, with weight as power.
Experience the imagination of Da Vinci