Smithsonian Newtons Cradle Bring physics to life with the Smithsonian Newton’s Cradle, a classic science demonstration tool that visually explains Newton’s Third Law of Motion, momentum and energy transfer. When one or more steel balls are lifted and released, the energy moves cleanly through the row, causing the ball on the opposite end to swing upward—illustrating action and reaction in a captivating chain effect. Ideal for classrooms, homeschool labs, office spaces or hands-on STEM learning, this Newton’s Cradle encourages observation, experimentation and discussion. Kids and adults can study how changing variables such as number of balls released or swing height affects the motion and longevity of movement. The cradle also functions as a calming sensory display and stylish desk accessory. Smithsonian museum branding ensures educational credibility, making it a standout gift for students, teachers, future engineers and science lovers of all ages. ⚠ Warning: Choking Hazard – Small Parts. Not for children under 3 years.