Don't let leakypedia put you off.
Princess Tutu is about ballet, and fairy-tales, Princes, storytelling, and the girl in the class who is the ugly duckling.
Which means this is a descent into a metafictional maelstrom, as well as being a sort of Utena-lite, without the sexuality (except in the guise of the marriage-obsessed Neko-sensei). And that it can draw upon the wealth of classical music for its sound-track.
uck yeah! I'm watching an anime for little girls! -- It's that good!