Sítio do Picapau Amarelo: O Minotauro(1978)

At Pedrinho's request, Dona Benta begins to tell the legend of the Minotaur. In the middle of the story, a strange visitor appears on the farm and takes Aunt Natácia to some unknown place. Upon discovering that she was kidnapped by the Minotaur, the whole gang goes on an adventure to try to save Aunt Nastácia. And that's when the fun begins.