Ivana Brlić-Mažuranić is considered to be one of the most important female writers in the Croatian literature. Her children’s novel The Wonderful Adventures of Hlapić the Apprentice has also been made into an animated movie and a feature film. The first part of this thesis lays down the most important information about the author's life and about the novel itself, which is the subject matter of the thesis. The reception of the novel has presented different ideologies and influences which affect the interpretation, but also the acceptance and understanding of a very essence of the novel from its first publication until today. The rest of the paper discusses the adaptation of the novel into an animated movie directed by Milan Blažeković (1997) and a feature film directed by Silvije Petranović (2013). The commercialization of zoomorphic characters is also discussed. The thesis analyses the differences between the adaptations of the novel, while putting the emphasis on the characters, the dog Bundaš and the relationship between Hlapić and Gita, furthermore it analyses the composition and arrangement of pictures, songs and their importance, as well as the language and style.