Extensive full-frontal and rear nudity of all three boys (Plamen Nakov, 10, Lachezar Yankov, 11, Kyamil Kyuchukov, 5). When the boys reach a river they undress, splash and play. The 2 eldest paddle and swim in deeper water approaching a bridge. There Aleko's hand becomes trapped in the stonework. The eldest runs off fully naked still to seek help.

A little later the eldest boy, seeking help, runs on a road, crosses fields and flags a (steam) train to a halt before leading those aboard to the bridge. He is completely naked throughout.

At the end of the film there is a stop-motion repeat of part of the first scene where the 3 boys splash, play and swim. It is blurred by water spray with brief nudity.