This foraging device seems to be enthusiastically enjoyed by most Parrots.  The Foraging Wheel is a favourite of highly active Parrots, especially Amazons, Caiques, Cockatoos, and Macaws, and very bright Parrots, such as African Greys.

Your Parrot must use the knob to turn the cover plate and expose the food items within each chamber.  To release the wheel from the bracket, you simply pull down the latch on the bottom of the bracket, raise the cover plate and unhook at the top.  The wheel is then free.  Unscrew the cover plate to refill the chambers, put the cover plate back on, hook the wheel on the top and fold down, secure to the bracket by pressing the bottom latch inward and it will snap closed.

It only takes a few moments and your Parrot will be happily engaged for several hours.  To encourage them t0 keep working the wheel refill each chamber with a different type of food.