We use the apple juice method at work when we have a hard time getting a birdie to eat pellets. Works like a charm!!

Most fruits and veggies are ok for birds to eat. I know Avocado is reputed to be bad for them though(It's up for debate, so I just wouldn't risk it). Here are a few of the things we give our birds at work:

Mango, apple, kiwi, carrot, bean sprouts, parsley (in small amounts), tofu, papaya, raspberry, blackberry, oranges, cantaloupe, potato, squash, pears, peas, etc etc...