Gekkenbriefje

Gekkenbriefje (Alternatively: Crazy Going) is a 1981 Dutch film directed by Olga Madsen. It is based upon the book "Zorg dat je een gekkenbriefje krijgt" by Ger Verrips. It was the first movie directed by Olga Madsen. The film's premiere was on 10 September 1981, but it had previously premiered on television a year prior on 22 September 1980.

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.