Listonošky.

The bachelor's thesis tells an original story about how children have great imaginations and their playfulness can cause all sorts of fun things to happen. Three little girls would like to become postwomen, so they use old love letters written by the father of one of them, a local teacher, to her mother when he was in the army. They deliver this "mail" to their neighbors in the village. They have no idea what a stir the letters will cause...