Kinetic Light Newton Cradle Balance Ball Price: $93.88 (as of 11/07/2020 23:57 PST- Details)

The motion of this 5-ball cradle is the most addicting way to demonstrate Newton ‘s law of conservation of momentum and energy, which makes it a great teaching tool, in addition to being fun to watch. And we ‘ve equipped each frosted glass sphere with LED, it ‘s even more amazing. Lights 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. Specifications: Item Type: Night Light Light Source: LED Size: 20cm*15cm*18cm Material: Plastic+ Frosted Glass Batteries: 6 X 1.5V AA alkaline batteries (not included) Features: 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 Package Included: 1 x Kinetic Light Newton ‘s Cradle Balance Ball (Battery is not included)