Hi, r/fosteranimals! A few people have asked about the enclosure I use. I got it on Amazon atfter noticing it in a video by kitten rescue advocate and YouTuber Kitten Lady. It's designed for small critters like rabbits and guinea pigs, but it is strong enough for kittens up to about 12 weeks. Unlike most playpens, it's modular, packs flat for stowability, and most of all, climb-proof. I'm ordering a second set so that I can build larger enclosures and have some spares.
Tespo playpen It seems to be unavailable on amazon at the moment but there are plenty of other similar products in stock.
:)