Based on 'Dikkertje Dap', a children's song written by Annie M.G. Schmidt. Elements from the song seen in the film include: Dikkertje feeding the giraffe sugar cubes; climbing a ladder to slide down from its neck; red boots for protection against the rain; and Dikkertje's talent for drawing figures.
Dikkertje's neighbor across the street is shown walking his dachshund called "Takkie". Takkie the dachshund is another creation of Annie M.G. Schmidt, whose song 'Dikkertje Dap' was the basis for this movie.