Just Because You're Grown-Up

Eleven-year old Míša has the temperament of a proper boy and endless problems with the grown-ups. It is no wonder that he longs to become an adult without further delay. Míša keeps house together with his father and has various duties. After a failed attempt at dish-washing he goes off to the research institute where his father is working on an important invention. He is trying to produce a substance that would make poultry and other animals bigger and thus help the struggle against famine in the world, but so far he has only managed to produce a shrinking substance. After his father leaves the laboratory, Míša mixes up different ingredients and makes the growth substance. He drinks it and instantly becomes an adult. His father, conversely, turns into a toddler after drinking the shrinking substance with his beer by mistake. Míša is delighted by his new condition at first, but finally learns that adult life is not all about privilege. He has to look after his toddler-father and this is no simple matter, even with the help of Olinka, his energetic friend from school. Míša attempts to return to childhood, but only succeeds in attracting the attention of unsuspecting journalists at the institute, who pursue him asking for an interview. The desperate boy keeps running away from them until his father wakes him up from his frightening dream. And his mother, who has just returned from the hospital, shows him his little baby brother. (official distributor synopsis)