I put a toilet paper roll up on the shelf my keet likes to sit on. It just sat there for a few days but now I guess she's used to seeing it there, and last night she stuck her head in it and lifted it up. It was so funny sitting on her head, she was enjoying it. Now she loves playing with it.
Just an idea to try with your keets, maybe they'll like it 2.
I spend money on toys and she doesn't use them, yet she plays with a toilet paper roll..go figure