About This Heavy-Duty 1.7lbs (775g) Construction: Unlike lightweight plastic toys that wobble, our cradle weighs nearly 1.7 lbs. The 235g wood base combined with a heavy metal frame ensures the unit stays perfectly anchored on your desk while the balls swing Solid Steel Balls & Metal Frame: The 500g+ metal assembly features high-density solid steel spheres. This extra weight maximizes momentum conservation, allowing for a satisfying, rhythmic swing and a crisp "click" sound that cheap hollow balls cannot produce Smart Tangle-Free Packaging: To ensure the heavy steel balls don't tangle during shipping, we package the frame separately from the wooden base. Simple DIY assembly is required to guarantee your premium gadget arrives in perfect condition Visualizing Momentum & Energy: Demonstrates Newton's Laws with a rhythmic swing (approx. 20-25s due to air resistance). A sophisticated educational tool for teachers to explain physics, or for parents to spark scientific curiosity in children Sophisticated Desk Gift: The combination of polished steel spheres and a classic wooden stand makes this a perfect gift for bosses, physics lovers, or stressed coworkers looking for a moment of Zen
