That's pretty cool. I've thought about building something like that for my cats, but then I realized it would just end up being a bunch of hard-to-reach spots covered with cat hair. It's already a full-time job vacuuming the hair off the couches.
That reminds me, does anyone have any scientific explanation as to why cat hair sticks so tenaciously to everything except cats?
or why a cat will instantly go to the person who is allergic to them?