Well, my new cat play gym arrived for the ratties. It's a total rip-off for any cat owner, since the thing isn't even TWO FEET tall! But, it's a plus for my crew, since it's the perfect rat size It only cost $26.98 all together with shipping, which I think is quite a steal. I just put it together, and my two cats, Nubbie and Salem, couldn't even fit in it I'll have pictures up later once I get done cleaning of the ratties romping in it. Here's the picture from the website:
I'd be interested myself. I've been planning to make one for quite a while once my rattie room is finished, but I don't really have much time right now to be working on something like that. I wonder how much they'd cost to ship.