Ah, those were the days. All of us have done it. Wished we were older, so we could do more. Well, in the movie "Big", a child's wish to become big comes true.
Josh is a boy who is not tall enough to ride a roller coaster at a theme park. Humilated in front of a girl he likes, he goes to a "fortune telling" machine, and wishes he could be bigger. He wakes up the next day as a man. When everyone he knows throws him out of their lives, except his best friend, he goes into the adult world. Just by knowing what kids want in toys, he becomes a success in a toy company. He also manages to get a girl wanting him(even though he is completely oblivious to it). All he wants is be himself again.