Bases on the children's book 'Wiplala', written by famous Dutch author Annie M. G. Schmidt.
根据荷兰著名作家Annie M. G. Schmidt 的同名小说改编
When the main cast is flying over The Dam, they pass Madam Tussauds, where the wax figure of Annie M.G. Schmidt is visible in front of the window. Annie M.G. Schmidt is the author of the children's book the movie is based on.