They will appreciate a nest box as it offers some privacy to them. Both our parents sat on their eggs, and even our hand-reared male would come out hissing at you.
I would not recommend breeding if you are not experienced, are going to have to probably sell the resulting babies to less than stellar homes, and don't have the time it's going to take to help raise them.
If you do breed, read every single book/website you can. Don't just look at wikipedia. Join bird forums, ask questions from good, experienced breeders. Often they are thrilled at helping a newcomer.
I would personally just remove any eggs that were laid for now. Especially if you are trying to bond them to you. It will just serve as a negative distraction.
Also, my female became very sick one day. We had to take her to a specialist bird veterinarian as our normal one had no idea. I believe it ended up being some kind of early fatty liver disease caused by a a high-fat seed diet (the internet wasn't as well utilised back then as it is now so we thought seed was fine).
We switched over to some kind of pellet and started feeding a more varied diet. Ours used to enjoy picking at grass seeds and millet sprays, and the occasional apple. We also keep cuttlefish in there to provide them with some calcium.
I believe our female died much earlier than she should have due to our ignorance. Just make sure you do as much research as possible about these guys.
i wasn't expecting to breed them, i was actually going to buy a seperate cage for one, but it turns out that i have no left over money :(
that's what a cuttle bone it :o my mom just bought one the night we got them, i just put it in this mourning, there is like 1 and half of them in there
Ok I'm talking with my sister and she said if you want babies you'll need a nesting box, if you dont (recommended for non aggressive birdies) dont put anything in their cage. She doesn't recommend separating them because they are a pair, unless you keep them right next to each other, they'll go into depression and get sick easily. Um she also just recommended leaving your hand in the cage and ignoring them. They'll get used to your hand. When they do land on it give them a treat and reward them.