It is hard to inventing things to let the birds play with.
But this is always good. And playing with food is oke
*Nevertheless it is useful to have somebody around who smokes!*
Take a nut, put it into a cupcake wrapper, fold closed and crease a piece of paper towel around it. Do this in an empty cigarette pack, take silver paper (on the inside) out and (outside) plastic too. In the box and the birds are equally sweet with demolition and searching for the tasty snack!
Also a nice snack is this:
Apple, grape, banana, rocket salad, cooked pasta/veggies, beepollen and hulled hemp.
This website is full of nice foraging ideas for your parrot(s)!
It’s easy to do it yourself and with low costs!
A toy example with two bottle caps: