This charming device demonstrates the harvesting of momentum and energy by a series of balls swinging back and forth. Unlike other pendulums, this one features light up glass base board, that illuminates the balls for more entertainment.
- 4 AA ( 1.5 V ) batteries are required to emit light
- Size: Small: 9 x 12 x 12 cm/ 3.54 x 4.72 x 4.72 inch
Medium: 11.5 x 15 x 15 cm / 4.52 x 5.9 x 5.9 inch