Tomás lives in a very small Czech town and is a nature lover and a birdwatcher. He struggles to keep the forests he loves clean and constantly fights his "archenemy" whose sister and Tomás's classmate is secretly in love with him.

Postwoman Mrs Skorepa, her husband the ambulance driver Mr Skorepa and their eleven-year-old twins Petr and Pavel live in Prague in Malá Strana (Lesser Town), one of the Prague's historical and oldest quarters. The boys are crazy about cars and everything linked to them. They don't share their father's love of classical music. On the other hand, they are crazy about the newly announced scrap yard competition for paper collection. The lottery tickets awarded for every ten kilograms of old paper collected could win them a go-kart.

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.

There was a school. And one day, a parrot named Bořivoj came to the school and got all the A's for himself. The children - the pupils - can't just leave it like that, so Eva and Petr set off to the mysterious exotic land of parrots. Climbing, repeating old truths, chasing grades without regard to real knowledge and understanding - simply parroting - that's what the authors try to denounce in this musical comedy with humorous exaggeration.

After her parents' divorce, Petra lives in her mother's new harmonious family in a small town. However, she feels that she was cheated of a lot when she was unable to spend two years in Cuba with her own father. Therefore, she welcomes her father's offer to move to Prague with him. She is especially attracted by his promise to help her get into art school. However, she misses the warm family atmosphere in Prague very much, even though her father's new wife tries to understand her. Although her father provided for her materially, he did not really care for her. Petra's crisis is compounded by a negative opinion from an expert about her artistic talent...