Three possible choices

Harry porter and the death hallow. First time there is no protection of the professor, they ran out of the Hogwarts to against the army, the death of the headmaster and the battle between Voldemort and Harry was the most exciting part.
Up, a unknown old man and a Boy Scout happened in the up in order to achieve the old man's dream for his wife, the growth of the Russell and the change from Carl made this trip not boring.
Peter Pan, Wendy and Peter Pan went to Neverland in order to play and escape from her parents. But finally Peter Pan stayed in Neverland and Wendy went back to  society. Two different personalities must had some collisions.