How many movies have Erik-Jan Slot and Martijn van Nellestijn collaborated on?

They have worked on 7 movies together! Their first movie together was Sinterklaas en het Geheim van de Robijn (2004) 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.