I probably shouldn’t watch “13 Going on 30” if my age is 13 plus 30 (OK, maybe a little more). Jennifer Garner’s whole bright-faced innocent youthfulness is usually very refreshing, but when she is playing someone who is, in fact, 13 years old, it is refreshing overkill. This 2004 movie is part of the whole “be careful what you wish for” genre that “Big” and “Freaky Friday” inhabit, where the kid wants to grow up too soon, magical hijinks ensue and a Valuable Lesson is learned. It would have helped to not be cynical, but I’m out of magic dust.