What a great play structure! Way better than the usual T-shaped perches.
I noticed that the safe flower list included a lot of herbs... maybe your walk-in cage could include an herb garden, inside and/or around the edges... something for humans to enjoy as well. If you put salvias, monarda, flowering chives, etc. inside, you'll get butterflies and bees as well, depending on the size of your cage mesh. Are bees a concern, do you think?
