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Pull one ball and release it to transfer its energy to the stationary balls and create an equal but opposite reaction to the one on the other side. The number of balls you pull will equal the number of balls that will react accordingly.
Additionally, the sound produced when one ball strikes another helps enhance creativity, concentration, and relaxation.
Small size: 17cm x 11cm x 10cm
Specifications are collected from official manufacturer websites. Please verify the specifications before proceeding with your final purchase. If you notice any problem you can report it here.