Three nine-year-old boys are ridden with guilt after chasing their classmate into a busy street, causing him to get hit by a truck.

A children's adventure spy film from a time when the radio telephone was science fiction.

Six-year-old Anička Čejková has moved with her parents from the village to a new housing estate in Prague. For now, she and her father are alone, but her mother is due to return from the hospital soon with her newborn Ondřej. Anička gets lost during her first walk around the neighborhood, but a nice young woman helps her. She is teacher Řeháková, in whose class 1. And soon Anička will start. The first-graders like the school, and when Anička confides in them that her mother will be back soon, they decide to give her a festive welcome.

Frantík arrives in Prague for the holidays and discovers an abandoned tram named Terezka. With local children, he secretly paints and hides it to prevent scrapping, then organizes a scrap-metal collection to raise funds for its restoration.

The water fairy Rusalka falls in love with an earthly prince. In vain, Father Aquarius warns her. Her sincere feelings are met with human treachery...