The motion of this 5-ball cradle is the most addicting way to demonstrate Newton's law of conservation of momentum and energy.
Each frosted glass sphere is equipted with LED lights that react based on their position.
Start a kinetic chain reaction with one ball and see how the others change color in response. One from each end set the LED to a single color and watch the light fade as they swing back and forth.
See the laws of conservation of mass and energy expressed in color
Programmed with three lighting modes - flash, fade, color cycle
Bright, multicolor LED in each sphere