SO LET'S MAKE THEM MORBIDLY OBESE YA'LL!
The most calorific Kids Meal in America is Friendly's "Mac and Cheese Quesadillas", a meal which includes a drink and a dessert and adds up to 2300 calories. An adult needs 2000 per day.
But I mean if your child is really, really hungry then why not?
I'd love to have a little child the size of a house. Then I would make it fight pitbulls and take bets. You know how I get that money son!