Hmm, interesting, thanks for sharing. The videos are very cute. I'm not sure this would be right for my cats, as my sense is that they prefer to climb things that are more stable (for example, they love climbing poles and cat trees, but lost interest in climbing curtains after the age of 1 or so). When they were kittens they would have loved it though.
I'm glad people are making nutty stuff like this though and trying various things.
BTW, one discovery that I made recently is that etsy is actually a pretty neat place for cat stuff. Check out all the hand-made cat beds for example! I recently ordered one of these beds, and should have it in a couple of weeks I believe.
http://www.etsy.com/shop/JennysKnitCo?s ... _leftnav_2My cats love wool stuff, so I have high hopes for this one.