It's one of the best Soviet film for teens. Firstly, the plot shows the truly friendship between children and their confrontation with director of pioneer camp. The quotes from this film is known by many people. Secondly, the cast is awesome, especially I like the play of Evgeniy Evstigneev (director) and Aleksey Smirnov (caretaker). Thirdly, some visual tools that were used by Elem Klimov are great
So, it's amazing family film.