The exhibit article does not stop rotation, the colored liquid in six pellets impacts the low three balls from upside three balls. And the audience will try to find what make the transparent balls keep eddying. Is it the impact of internal liquid makes the big balls imbalance ? Or it is a perpetual motion machine?
Obviously, the rotation of the balls is not a perpetual motion machine, its energy comes from the ultra distance energy transfer of traveling magnetic field. There is traveling magnetic field in the lower part platform, this high frequency magnetic field induces electromagnetic force on fringe rim of the spinning ball, and the electromagnetic force impetus the wheel running.