I had to chuckle at the mental picture I got of this, when I first read it. I also recently put it to the test.

I was visiting my brother in August and he has a chair lift to his basement office, work shop and laundry. I thought I'd try to interest his 2 cats in this game, so I took one of the kitty balls and rolled it down, retrieved it, rolled it down again, and again, and again. Smokey the snobby Persian just looked at me and got that "it's beneath my dignity" look and walked away early on in my endeavors. Cocoa the Meezer watched for a little longer, and after giving me that "have you lost your marbles" look, left me to play this game by myself.

Obviously, they just don't know how to have fun!!!