On the way home from school, at the first half of the movie, the six children stop to go skinny dipping. One boy and 2 girls are seen nude from the rear in this brief scene.
Partial chest exposure where Marie (Rebecca Hampton, 12) shares a bathtub with her mother. In this scene she makes a game out of licking waterdrops of her mother's chest and arm, which, if taken out of context, could be interpreted as being of sexual nature, but it's just playing.