FAQ: How do you write Children's dialogue?

In The True Dragon of Atlanta, there are 10-11 year old twins who seem... unique. Their dialogue is both believable and unbelievable at the same time. That is because I wasn't writing "Children" characters. I was writing characters that happen to be children. That is a critical difference. I also limited their conversations to how they interact with each other and authority. That doesn't reveal their total selves. What can be discerned is that they are both brilliant and bitter in the extreme. T...