Unfortunately, I have a cover can open so that he can move the ball with his paws.
It has been more than worth it, especially he likes the ball to get out and they shoot in the whole house through the area.
Game about 2-3 hours per day (and for me 1 hour search of fun after the balls)
Here at Amazon price is very interesting, in the animal business sometimes loosely 20s.
Each of the even considered: BUY!
Even as a tip: I bought the glowing ball that! We recommend.