Model Number:Yuti_ff_5425kdht_121820001561102 Package Dimensions:9.1 x 7.9 x 2.8 cm; 42 Grams Item Weight:42 g Specification: Condition: 100% Brand New Item Type: Home Ornament Material: Metal Product Size: Approx. 8 x 7 x 9 cm , 3.1 x 2.8 x 3.5 in Package List: 1 x Ball Toy DIMENSIONS: (L) x (W) x (H) 3.1 x 2.8 x 3.5 inch(appr.) Classic Newton's Cradle Laws. NEWTONS CRADLE: Watch as one ball on one end strikes the other sending the one on the opposite end into the air while the ones in the middle stay perfectly still. Continue in perpetual motion for only 15-25 seconds due to the resistance of the air and friction. DESK DECORATION: This Newton's Cradle is a perfect decoration for desks and tables, whether at the office, classroom or at home. TEACHING TOOL EDUCATIONAL TOY: Demonstrate conservation of momentum and energy with these swinging spheres. Let's start from Newton's cradle balance balls and give the dream to your child! MATERIALS: The cradle is made of durable stainless steel, the metal balls feature a reflective mirror finish and the base is made of plastic. DIMENSIONS NEWTONS CRADLE DESK DECORATION TEACHING TOOL EDUCATIONAL TOY MATERIALS