The Snow Queen (1986)

In this adaptation of Hans Christian Andersen's longest story, the beautiful Snow Queen has captured two children and now keeps them apart. She has inserted a sliver of her own special ice into the eye of the boy, so that his heart will turn to ice and will be a proper match for hers. The boy's sister, meanwhile, has won free and attempts to find her brother. When she does, the warmth of her love for him melts his frozen heart and defeats the Snow Queen decisively.