Around a month or so we decided to change the girl's set up from the old set up with an upper level as their "bedroom" into this, completly flat. They were spending less and less time in the upper part, mainly because the weather is turning warmer here, so I took it off and I made this instead. The big red little box is one of the levels of the store cage we bought in the begining last year, and the one we used as a second level before this set up.

They love it now, I gave up some scarfs of mine for them to chill out there and hide. :D