• It only needs a gentle push to set science in motion!
• Pull back and release one of the metal balls to create a propagating display of physical motion.
• Perfectly demonstrates the laws of conservation for both energy and momentum.
• Great accessory for an office desk, but also perfect as an Executive gift.
• The cradle measures approx. 18cm x 12cm x 12cm (7.08” x 4.7” x 4.7”).