Cmadler The allusions to sex are veiled, brief, and limited. They're likely to fly past younger children unnoticed. Depending on your opinion on that and your child, it could be considered for a younger child. If it were a movie, it would certainly be rated PG, not PG-13.
CQ I would recommend it to kids 13+. I don't remember any foul words, but I know there are a couple of allusions to sex, though nothing overt.