MOVEMENT: 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 engagingly. SCIENTIFIC DECORATION: In addition to its educational value, this pendulum serves as a and eye-catching decorative piece for any office or living space, adding 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 pendulum display. SIMPLE 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. EASY TO STORE: Compact yet substantial, making it a versatile and attractive addition to any space. Requires 4 AA batteries for power supply. Batteries are not included in delivery. SPEC Color: As shown Material: plastic Package Contents: 1x plastic ornaments Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.