This is current set up for my single budgie Kaladin. He's in the A&E flight cage which is 21" by 32" by 35", and I LOVE this cage. The only thing I don't like is that the side doors are a pain to open, so I just don't. Highly recommend it, though.
I don't have a ton of toys in it at the moment, nor do I have stainless steel bowls. I do have some more rattan balls (if you can't tell, he loves them) and Chinese finger traps, as well as stainless steel bowls, coming tomorrow, though.
All the toys that are currently in there besides the bird kabob I made myself. I took the hooks off of the ladder because I didn't trust the metal they were made out of. It was kind of yellow...
The little paper balls I made myself as well, and they're great for foraging and as foot toys, or just hanging from a string. I learned how to make them from watching a FlockTalk video, but I don't know which one it was...
Oragami is amazing! Great for foraging! I made some paper cubes a while back, and Kal loved them. He is still hauling around the remaining one whenever he's out of the cage. It's really big, but he still carries it around and dumps off the side of wherever I put it...
There are currently only three natural branches in his cage, but I have some from a few of our trees set aside that I'm going to be making more perches out of. The rope perches I have in there don't hold their shape super well, but they work for the way I'm using them. I'll attach a picture of his bigger playstand as well. We just call it his tree.