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♔ 【High Quality Materials】 Excellent educational science gadget. It not only demonstrates a pendulum, but also shows the laws of conservation of
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【More Durable】With steel frame and 5pcs high polished smooth steel balance balls, which is more durable and easy to transfer and store more energy
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1. High Quality: This newtons cradle is made of a solid wood base, fishing line, stainless metal balls and frame, durable for long time use, sturdy
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