We always had ropes for Sugar and Ray, they were never really interested in balls. We bought Odie a soft squeaky ball and he loved it, but Sugar at nearly 10 years old, went CRAZY for the thing!! So I went and got another two rubber squeaky balls (one each for Sugar and Odie) that would be a little more hardy than the soft one. Sugar is so funny to watch with them, she carries one around in her mouth everywhere and there is a constant squeaking going on. Had I known I would have bought her one years ago!!
Of course the laser pointer is also always a hit.