There is also a scene near the end of the film where the young girl (5?) turns to wave from a boat, exposing the left of her chest as the swimsuit is out of place.
In a scene a boy (Nathan Forrest Winters, 13) walks around in only pajama bottoms, then wets his bed when frightened by a dream. In the morning his butt is seen as he pulls on dry underwear.
Pollyanna opens with a close-up of a naked backside of young blond boy, who swings from a rope swing away from the camera jumping into a river. The boy is played by William Betz, who was 7 at the time of filming. Skinny-dipping scene with boys (11-12).