How many movies have Bart van Leemputten and Gert Verhulst collaborated on?

They have worked on 17 movies together! Their first movie together was Plop And The Gnome Treasure (1999) while their highest rated movie together was Plop Special: The Gnome Easter Bunny (2010). They have not worked together since K3: Animal Hotel (2014). They are most known for their family films together.