The director of films for kids called Bonzurka together with her loyal assistants Drahuska and Honza are looking for the actors for a new movie "The Knee". Children for this movie should not be afraid and shy and they must have talent for acting. Thus the scouting is quite difficult. The most difficult is to find an actress for a main character who lost her hair after a serious illness and now has to spent the whole holiday in the countryside with a bald head resembling a knee. Although the makeup artist does his best an artificial baldness does not solve anything. From the selected little girls only the self-assertive Rosemary has the guts to let her long hair to be cut and shave off her head.

In the frontier village Vetrov boys from the children's home called Indians lead a bitter "war" with the local Símáks. Before a battle the Indians have a meeting in the sandpit with a smoke signaling. The smoke brings to the sandpit a frontier guard Tomás with a police dog Ranek. The children learn from Tomás that Rank served out and that it shall be destroyed. The nine-year old Fanda writes a letter to the "minister of the frontier guards" in which he asks to let Ranek live. To save Ranek's life he also visits the local frontier guard commander. In the end it is decided that children from the children's home may keep Ranek.

Ten-year-old David joins a sailing club. He trains hard and helps repair the sailing boats, but people have to take turns actually sailing. The club chairman Vala wants David to sail with his son Olda. Olda's previous team mate Béda has grown too fast, but with little David Olda could win a place on the regatta to Finland. Olda is arrogant and accustomed to winning with little effort; he bullies David and calls him "Greenhorn". He makes David his servant and blames him when things go wrong.

The Mráz family is preparing for holidays. Parents are traveling to the spa and little Petr is going to the country to his grandparents. In addition, to the chaotic preparations, mother's friend is bringing a dog Blek. She wants Petr to look after it. Grandfather welcomes Petr and the dog with pleasure because he needs the ally against strict grandmother. Grandfather is not very skillful and thus grandmother often experiences troubles with his ideas.

World War II is slowly coming to an end. On the German side of the border, panic slowly breaks out and the local commander orders the local port to be mined. The Czech boatmen take advantage of the sudden confusion and decide to carry out a crazy plan: steal a German ship full of explosives and sail towards Prague, which according to fascist plans is to become the last German stronghold...

The ten-year-old orphan Borisek is fathered by the entire military unit. The boy serves there with determination as a medic. When he and the soldiers reach Bohemia, he meets the mother of the soldier he saw die, but for a long time he does not find the courage to tell her the cruel truth...

A colour-printed melodramatic selanca from the beginnings of the organised labour movement in Bohemia... Antonín Zápotocký, the second workers' president, is the author of the literary novel Rozbřesk - the plot is said to be inspired by the fate of his grandmother and mother.

A group of children are investigating a chain of mysterious events during the seventies.