HOT ITEM - Every action has an equal but opposite reaction-right before your very eyes.
Science demonstrated clearly and simply and with a touch of a amusement.
To play with the balance ball is a game of fun.
If you pull up one ball and release, you will see only one ball move from that reaction.
If you pull up two balls, two balls will react.
The cradle has a wood base
Size is 5 3/4"
Try and see it for yourself!!!
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