Cat Wheel
 

Two of our kitties seem to really like watching this, maybe I need to get handy and build them their own kitty wheel :)

My first reaction was that the only way our cats would do that is for food. And sure enough...

I can't imagine having that noisy contraption in my house when they want a late-night snack!:p

It could easily made much quieter.

Yes. I'm not sure why they put the stick tapper on top. And at first I was wondering what the washing machine drain hose was for, fresh air? Then I saw the treats (at first they looked like raisins, or worse). That's a great way for a cat who can't go outside to get exersize, as long as they don't eat too many treats!