One of the every day staples my Congo and Timneh have to eat is Edamame, or soy beans in their pod. They have had them every day for about 8 years. I get the bags that are Frozen and boil them once a week. The bags says to boil them 5-6 minutes but i think that's too long. I boil 3.5 minutes and while they are cooling they are still cooking. I'm not sure what age they can begin this, certainly after weening! Then the fruits and veggies can be changed around from week to week. These birds like change, and not so much change. I'll change from red grapes 1 week to green the next. From green apple to red apple or both. There are numerous books out there too! There is a lot to learn about these magnificent birds! When you do introduce toys how to go about it. ie let it sit out in sight of the birds before introducing it into the cage etc.
Also learn about what might happen when there are 2 of you raising it (them).
Have a great time!
Colleen