How do adults know when something is for boys and when it's for girls? Who tells them so? Where do they learn it? For eight-year-old Luca, it's a mystery, but if he can't convince his parents to give him the white ice skates he has his heart set on, Christmas is going to be ruined. Who does a child turn to when he can't even count on Santa Claus? "Last year, they saw a commercial on TV for Barbie Magic Hair, a Barbie with no body, just a big head...