L'île atlantique (France 2003)
https://m.vkvideo.ru/video-159082401_456240434
29:20-29:49
Naked boy is chased by older girl, likely his sister, around the house.
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Sommerjubel (Norway 1986)
https://m.vkvideo.ru/video17524352_456240461
2:25-4:45
Two 12-year old boys skinny dipping.
5:20-8:02
The boys make a pissing contest and two girls peek at them. They giggle and tease them, and the embarrassed boys go back into the river. The girls grab their clothes (obviously!) and throw them on a tree. The boys are so embarrassed that they try to cover their butts when they get out of the water to retrieve the clothes, but they have no other option that to expose themselves completely when they have to jump to do so. The girls are having a GREAT time

14:45-17:20
The boys and the girls skinny dip together, playing around and singing.
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Olle hexe (Germany 1991)
https://ok.ru/video/14452177898121
6:55-8:30
After taking a bath, a 9-year old boy paints his face and body with lipstick. He goes outside the apartment where his mother is speaking with a neighbor. The boy is not shy about being seen by the women, but when a girl appears he retreats to the apartment in shame.