Hop on over to Amazon where you can score this highly-rated Mini Newton’s Cradle Only $11.98 (Regularly $39.96) when you use promo code EZWOVCD4 at checkout.

Newton cradle demonstrates the third law of motion with swinging spheres; when one ball is lifted and released it sends force through the rest, pushing the end ball in the opposite direction; these swinging kinetic balls are perfect addition to your office desk decoration accessories or teaching tool at schools.

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