What are some movies that are non-worldly but kinda childish?

Kinda of like Sea People, The Thirteenth Year, Aquamarine, and so on. My little sister is obsessed with these kinds of movies. She's 12 so nothing 'bad' or my mom will get mad. Please names as many movies as you want. It's doesn't matter. Oh and she loves anime or cartoon movies with mermaids in it to. =)Thanks!!