Next to Niklas and young girl Merle in short Lederhosen (rating 3, see main post) they also wore blue shirts and white collars and caps. I now have re-uploaded both pics that were missing from the main post. I think very few and brief scenes.
Also boys and girls in overalls/shortalls (other blog rating 5). Was also on my shiny shorts blog (rating 5).
https://sailorsuitsandlederhosenfilmblog.blogspot.com/2017/08/die-kinder-vom-alstertal.html