The toy works just like I had imagined, turning the knob on the lower body and the ball goes everywhere. However, the whole thing is a bit noisy, so I have the ball equipped with a few filzaufklebern to mitigate the noise. Second point is the mouse, I do not know what is in there, but my cat has the thing after 2 days gnawed completely :-). All in all a very nice toy, but occupy himself with the cat is still the best way to deal with it !!
