I have three girls at home, and they have all gone through the princess stage (my youngest, also 3 like your daughter) is right in the middle of it right now! The middle one (age 6) is already over it (though still tolerates it), but the 9 year old? She wouldn't be caught DEAD in anything resembling "princess attire". And, she was the "girliest" of all 3 of them when he was younger. I take every opportunity to tell them that they don't really need a prince - they can rescue themselves. If they find a prince? Fabulous. Just make sure that he reminds them a lot of dear old dad!!