@soyben16 At 3 or 4 years old the doctor looks at my growth and does some math or I think they can double a kids height at 2 and tell how tall they will be when they are done growing. They got my brothers height prediction correct.
@ruanddrew I still do this (graduating high school soon) and I'm 4 inches shorter than Im supposed to be and have 32 cavities. Nothing wrong with them eating what they love just make sure they take vitamins and brush their teeth.