Just got Ollie one, its similar to this
http://trainedparrot.com/Foraging_Tower/
but is yellow and has 3 sliding bits of plastic opposed to 4.
It took him all of half a day to suss it out with no training whatsoever. It reccommend you put food in the lowest level to start with but I went straight for the top level with the intention of making it easier if he couldn't do it.
I'm struggling to think of ways to keep him occupied, he already has a foraging wheel and a foraging wheel with a sort of maze attatched to it, a buffet ball, 2 diffent swinging maze type toys, a treasure chest, a barrel thing with a sliding drawer that is twisted to lock it but again these were figured out in less than a day. God help you lot with the bigger species, like the 'toos if I'm struggling to keep a little conure entertained for very long.
He already has stuff like egg cartons, cardboard boxes, paper wrappers, wood, bells, acrlic toys etc which he tears open but I'm wanting something which is going to be like a puzzle toy but a bit more challenging for him. They need to be suitable for a green cheek conure to operate, he is good with bigger toys provided he will have enough strength to open them and is in no danger of getting any body parts stuck.






