Older Than They Look/Playing With

Basic Trope: Someone looks younger than they really are.

Straight: Bob is fourteen but looks ten/eleven.
Exaggerated: Really Seven Hundred Years Old
- Bob even acts the age he looks.
Downplayed: Characters assume Bob is 12, but he's really 13.
Justified: When he got a tumor removed from his brain once, it also removed that part that makes him look older.
- Bob only looks like normal human. He's actually of a magical race that appears human in every sense, except they stop appearing to age after about ten years.
- OR: Bob just has good genes, or just happens to take good care of himself.
Inverted: Younger Than They Look
Subverted: He appears to be in the same class as Charlie, as well as Danny and Eli, who are in sixth grade.
Double Subverted: He's repeating grades.
Parodied: Bob looks like a baby, but is really middle aged.
Deconstructed: He can't buy M-Rated games or go into PG-13 movies without an adult.
Reconstructed: ...But the law states that age requirements are only based on mental or psychological ages, not physical ages.
Played for Laughs: Bob goes to get his drivers license and gets rejected for being too young. Frustrated he goes to an American bar, shows his ID and orders a drink.
Zig Zagged: ???
Averted: Bob is really as old as he looks.
Enforced: ???
Lampshaded: ???
Invoked: ???
Exploited: ???
Defied: ???
Discussed: ???
Conversed: ???