Explore the fascinating science of motion and energy with the Smithsonian Perpetual Motion Machine. This interactive kinetic display uses steel balls and balanced motion to show how momentum and force are transferred—creating a continuous chain reaction effect. A mesmerizing STEM learning tool and desk display for ages 8+.

Bring physics to life with the Smithsonian Perpetual Motion Machine, an engaging kinetic science model that visually demonstrates key physics principles including energy conservation, inertia and momentum transfer. Once set in motion, the weighted spheres swing and collide, keeping movement circulating in a steady, hypnotic rhythm—illustrating the balance between potential and kinetic energy.

Perfect for classrooms, homeschool STEM labs or as a desktop thinking piece, this perpetual motion machine encourages scientific exploration and sparks curiosity about how motion is sustained and energy moves through systems. Kids can experiment by adjusting the starting force, observing decay, testing timing and exploring how different variables affect movement stability.

Beyond scientific use, the machine makes a stunning display piece for offices, bedrooms or study spaces—providing a calming and inspirational visual centerpiece. Smithsonian branding adds authenticity and educational value, making it an ideal gift for young scientists, engineers, teachers and collectors of mechanical curiosities.

Product Details: 
Age Grade: 8+
Product Dimensions: 11.75" L x 2.00" W x 10.50" H
Material: See packaging
Play Pattern: Hands-on exploration & STEM play
Skill Development: Critical thinking & scientific reasoning
Care Instructions: Store all components in a clean, dry place and keep smaller pieces in labeled bags or containers to prevent loss. Use included tools, chemicals or materials exactly as directed and under adult supervision when required. Wipe surfaces and reusable parts with a dry or slightly damp cloth after use; never submerge electrical or sensitive components in water. Dispose of single-use materials responsibly after completing experiments. Keep kits away from heat sources, open flames and direct sunlight. Wash hands after handling science materials or experiment elements. For multi-session projects, label progress and store unfinished builds safely to protect components.