Parrot housing:

The inquisitive nature of parrots can lead to problems with their housing requirements. Parrots need as large a cage as you can afford and at the very least should they be able to fully stretch their wings out in all directions. The type of cage you need also depends on what you will be doing with your bird. If they are outside most of the day and only go back to their cage for food, drink and sleep then you will not need a cage as big as a bird that spends all its time in one. Cages are fairly inexpensive compared to the cost of the bird so do shop around for a larger one. Cages do need to be tough as birds will do a daily tour of their home and any weak points will be found.
Birds will need to have a variety of diameter of perches so their feet do not run into problems holding the same size of perch all the time. I would usually advocate having one concrete perch in the cage to try to keep the nails from getting too sharp. These can cause problems though if you have a particularly flighty bird as they could fly into the edge of them.
Toys are very important to most birds. There is a huge variety of different styles of toys from the destructive type to the logical puzzles where they can get food as a reward. It is very much down to your bird which types they prefer but if they are spending any amount of time in their cage then they are a very valuable purchase. Toys do not have to be bought and there are plenty of different websites out there that describe how to make your own parrot toys. I would usually try to have at least 2-3 different toys in the cage and these need to be rotated around every few days to keep them interested. I usually change the toys daily, it does not mean that they are discarded I just try to not leave the same toys in for weeks on end as birds will quickly lose interest. It is equally important to not fill the birds cage with toys which would prevent it from being able to move around the cage