maybe a teen eating as much as adult, but not kids between 9 to 12 or so unless your child has some kind of pitutiary problem the body release too much HGH and the child keeps eating to grow which results in gigantism andrea the giant had that problem as a kid at 9 years old he was 6'6" already weighing about 300lbs and could eat up a whole buffet...anyways yeah I agree with OP about a 9 year old charged an adult on the DDP.
My 9 year old is small doesn't eat much and only weighs 55 pounds but the kids meals weren't enough for her. 3 chicken nuggets 6 baby carrot sticks and 10 grapes with a small juice box just doesn't cut it.