5 stars for this toy getting the attention of my 13 year old arthritic cat. I actually bought this for him when he was a kitten but he had no interest in it. Having arthritis, he needs some exercise. On a whim, I bought it thinking my younger cat would play and maybe entice my older boy to join in. Quite the opposite, my eldest went crazy playing with this right out of the box, youngest not so much. I've had it for 3 days and watching him bat the ball with both paws is a joy! I just purchased the smaller, 2 ball toy, hoping for some interaction for both boys. Oh, my boys aren't small, 12 & 10 pounds, and this hasn't moved on the rug or tipped over. Just goes to show you CAN teach an old cat new tricks.