The Lion, the Witch & the Wardrobe (1979)

Four children, Peter, Susan, Edmund and Lucy are evacuated to the country in World War 2. They stay in a large house owned by an old Professor. First Lucy, then Edmund, then all four children find their way through an old wardrobe into Narnia, a magical land with talking animals and mythical creatures such as fauns and dwarves. But Narnia is held under a magical spell by the evil White Witch to ensure it's always winter but never Christmas. The children have to battle evil creatures and deal with betrayal and treachery but make many good friends as well. Finally, with the help of Aslan (The Lion) they defeat the evil witch and spring and freedom come back to Narnia.