Who Can Kill a Child?
¿Quién puede matar a un niño? (original)
A couple of English tourists arrive at the island of Almanzora, off the Spanish Mediterranean coast, where they discover that there are no adults in a small fishing village, only some children who stare at them and smile mysteriously.
Starring Lewis Fiander, Prunella Ransome, Antonio Iranzo, Miguel Narros, María Luisa Arias, Marisa Porcel, Juan Cazalilla, Luis Ciges, Antonio Canal, Aparicio Rivero
Watch "Who Can Kill a Child?" on FlixOlè released in 1976. It's a drama and horror movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie.