More than a year after its release, the highest-grossing animated movie of all time (it has brought in more than $1.2 billion at box offices worldwide) has crossed over to full-fledged cultural phenomenon among the preschool set. It has become a daily sound track for parents, to the point that Frozen director Jennifer Lee has begun apologizing to them. And Elsa, in particular, has taken on mythic status - for both boys and girls - rivaling even Santa Claus this holiday season.