My favorite childhood cartoon was and remains Howl's Moving Castle. This cartoon was directed by Hayao Miyazaki. This is really fascinating animated fantasy film. The film tells a story about a young girl named Sophie, who was cursed by a witch, and a really handsome wizard named Howl. The interesting point that it's hard to immediately guess who is on the side of good and who is on the side of evil. This is a love story overshadowed by a meaningless war.
I assure you that it's worth seeing.