And to add to that, although the computer doesn't say how many adult credits vs. child one you have, it is printed on the front of your KTTW card. It says how many adults and children are in your party. Most well trained CMs will refuse to allow you to get 3 adult meals if you are only entitled to 2.
You are allowed to share an adult meal with your child. Which is what I usually do. We then use kids credits for breakfast. 2 kids platters suplemented with a snack credit for a bagel or muffin is usually plenty for my family of four.
We usually split up when we took our 7 year old through the line--just because the other adult had to find a place for us to sit. We didn't use any Adult meals for him----but the girl at the checkout told me that THEY know how many adult meals and how many kids meals have been purchased. So since we didn't use any for him, I don't know if they'd stop you or not from always ordering adult meals for kids.
The whole DDP is totally confusing---and not only do we not all understand it, neither do the CM's. Billy, Bobby and Sue could all be the checkout clerks that day and you'd get 3 different stories of what's included and what's not.