I breed cats and I've bought this pen for my zoom-grown cubs. It is ideal as a playpen for the little ones, both in the apartment as long as they are not yet properly housebroken, as well as outside, if you want to give them a warm sunny day. The spacing of the grid suitable for kittens from 6 weeks, depending on the breed and head circumference. I've just bought two outdoor areas, as they can be expand so and really have little ones so that space to run around. The Ausfühung itself is very good. No sharp edges and absolutely easy to assemble, just as one space saving can disassemble it again. You do not need a screwdriver or other tool. The mesh walls are simply connected by a rod. Simply perfect.