Three nude boys fool around under a garden sprinkler.

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Boy's (12) pants are lowered in one scene.

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Young girls (5) seen shirtless in one scene.

The kids spend most of their remaining time together on the beach naked, the girl in particular, playing, wrestling or laying in the sun.

Unknown episode: Ayako Kobayashi (10) seen topless in one scene.

The third in the series dealt with sex education and showed in full details the sex organs, including full frontal nudity. It shows boys standing naked at the right hand edge of a swimming pool. It then pans to the left to show the same number of naked girls. The girls get into the pool and then the camera pulls back to show a long shot of both the boys and girls in the pool together.

Fri 21st May 1976, 11:00 on BBC One London 11.0-11.20 Merry-go-Round: Full Circle

This is the third of three sex education programmes for 8- and 9-year-olds in schools. This programme deals with conception, the sexual differences between male and female bodies and the function of the sex organs. It also deals with the care of babies by their mothers. Introduced by Richard Carpenter with Melissa Docker

https://genome.ch.bbc.co.uk/c91fe845f24b4312a68c3d5bc954af7a

Very brief distant frontal nudity of one of the boys.