Named for the father of modern physics, this tabletop addition is a fun way to pass the time. The simple mechanism features hanging steel spheres which knock back forth in the most basic example of the law of conservation of momentum and energy. The chain reaction will serve as a mesmerizing addition to your desk or a shelf in your home.

• (H)6.25" x (W)2.25" x (D)8"
• Stainless steel
• Two pounds
• Some assembly required