Materials: Plastic Size: 10*10*24cm/3.9*3.9*2.4 inches Note: Requires 4 AA batteries Perpetual Movement: The Newton's pendulum game showcases the captivating concept of energy transfer through the impact of swinging balls, creating a mesmerizing and endless motion that demonstrates a fundamental principle of physics in an engaging way. Scientific Decoration: In addition to its educational value, this pendulum serves as a unique and eye-catching decorative piece for any office or living space, adding a touch of scientific charm to the environment while providing entertainment and intrigue. Stability: The sturdy metal frame ensures the pendulum's stability, allowing it to be securely placed on tables or desks without the risk of tipping over, providing peace of mind while enjoying the perpetual motion display. Easy to Use: Simply give the balls a gentle nudge to set the pendulum in motion, initiating a continuous cycle of movement that requires no additional input, making it effortless to enjoy the mesmerizing display. Dimensions: With a height of approximately 21 cm, width of around 14 cm, depth of about 14 cm, this Newton's pendulum is compact yet substantial, making it a versatile and attractive addition to any space.