Argos do them too, thats where i got mine from but i don't think they are that big i have 5 guineas and they don't have much room in it, well their cage is 4.5 ft x 2.5 ft times two plus a 2.5ft square kitchen! so i only use mine for when i clean them out
Well, I got a ball pit from Santa and for the first time I set it up for the piggies today. It's a great size and so easy to put together, not sure I'll be able to fold it back down again into the same size in came in the box in though. I'm just praying they don't learn to chew the sides. So much better than the metal grid run I had for them before.