• This desktop display model is a version of cradle, a device that demonstrates conservation of momentum and energy via a series of identically sized swinging spheres. When one ball on the end is lifted and released, the resulting force travels through and pushes the last ball upward.
• Swing one, two or three end balls and the changing colors will keep you entranced for hours with multiple color from blinking to cascading. newton balance balls
• This Cradle can change the color of itself when it is opened. newton balance balls
• It can be an ideal for friends, family and yourself. Relaxing and stress release with it. newton balance balls
• The classic executive diversion gets a high tech upgrade with color changing LED glass balls. newton balance balls