Interesting and innovative, it shows the swing and the law of conservation of momentum and energy, a nice toy for kid.
When you are tired of studying and working, stir the ball to hear the clanging sound to reduce stress and ease your mood.
Simple operation, pull one or more balls backwards, then release, the same number of balls will swing on the other side.
Suitable for home decoration, study room or office table decoration, also suitable for birthday gifts and children's toys.
Exploring the important value of physics, can be room decoration, excellent educational science toy and sleep toys.
