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.
Two boys (10 and 11 years old) and a toddler girl bathed together. Split-second partial side nudity of the boy when he attempts to stand up in the bathtub.