How many movies have Erik-Jan Slot and Sonja Visser collaborated on?

They have worked on 5 movies together! Their first movie together was Sinterklaas en het Uur van de Waarheid (2006) while their highest rated movie together was Sinterklaas en het geheim van het Grote Boek (2008). They have not worked together since Joris and Boris (2012). They are most known for their family films together.