Kid's pool on roof of concrete building + girls swim in tandem and give swimming lessons.
Part of issue THE YOUNG IDEA.
Location of events unknown.
Various shots of small swimming pool on top of concrete building (looks like garage or bomb shelter roof). Looks very sunny, children all have tans - could be in Australia, South Africa or USA.
High angled shot of two girls swimming; one swims under water, other swims on surface. Various shots of girls giving swimming lessons to younger kids in outdoor pool. More shots of girls swimming in tandem.
Note: soundtrack is missing.