I was expecting a wire frame in this tunnel, but it's actually just a firm sheet of foam that forms a tunnel once it's zipped to the base - a pretty neat design. :) Both ends of the tunnel have hanging balls for play, and the open mat area should work well for kittens to play or lay around in a group. I don't recommend it for large cats though, as the tunnel size is better suited to kittens or small cats, and the tunnel itself could end-up permanently "smushed" if a large cat lays on top repeatedly. The non-skid bottom is that smooth fabric with dots that you see a lot, that (in my experience) isn't particularly non-skid. I took away one star for that and for the zipper that is really hard to start and is smaller than I'd like. The bonus blanket is soft and has pom-poms sewn onto two corners for some reason?? All in all, this will work well for the families that foster kittens each year through our local shelter and I recommend it.