You also have to be careful that the child isn't trying to fill up on the kid friendly noodles an chicken nuggets so it will tide them over so they don't have to eat the supper that mom cooks which might not be as child friendly. I know often the opposite is more likely to be true.
Just because a child can eat a certain amount of food and it doesn't look like it is showing on the child now I don't allow any child to eat more than an adult size serving which is equivalent to two child servings so seconds maybe and then that is it. And if I have a child that is constantly wanting more I make sure there are more foods on the plate that require them to slow down and chew and swollow instead of just wolfing it down.