Where the Wild Things Are (1975)

A young boy named Max who, after dressing in his wolf costume, wreaks such havoc through his household that he is sent to bed without his supper. Max's bedroom undergoes a mysterious transformation into a jungle environment, and he winds up sailing to an island inhabited by malicious beasts known as the "Wild Things." After successfully intimidating the creatures, Max is hailed as the king of the Wild Things and enjoys a playful romp with his subjects. However, he starts to feel lonely and decides to return home, to the Wild Things' dismay. Upon returning to his bedroom, Max discovers a hot supper waiting for him.