Wanderers in the Land of Dreams 1959
Whilst dreaming, a little boy in the company of Tijl (Uilenspiegel?) travels centuries back to the fairytale world with the help of two balloons.

Boys Like Us 1956
A class of thirteen-year-old danglers persuades the school administration to start speaking proper civilised Dutch. This takes place at a boarding school with a conflict situation between a young, idealistic and a brutal teacher.