At my local children's centre today they had the most amazing soft playpen for babies and despite a good google I can't find anything similar.
It was just like a paddling pool but made of soft stuffed black and white material, about 1.25m diameter. She could sit in it and because it was soft all around the edges and on the base it was fine for her to topple over without hurting herself - perfect as she's currently learning to sit unaided. It had matching black and white large stuffed balls in it. The label in it said TTK (or TKK) but I can't find anything like it on t'internet. I will probably call them on Monday when they open again but thought I'd ask here in case! It wasn't a regular baby nest but like a much bigger version of one!