There is a skinny dipping scene at beginning of film where one boy has rear nudity. There is also frontal and rear nudity of two boys and a girl diving or jumping into river.
There is only one scene with full frontal nudity. It's in the latter half of the movie when one of the older girls (Bérangère Haubruge, 13) is sitting in a metal tub in the bathroom. She gets out, looking at her reflection in the mirror and as she stands you get a fleeting glance of her completely nude.