My niece has gotten really into the barbie movies and Disney movies. However, all the old Disney movies often have terrible lessons to teach girls (looks are more important then intelligence, you should wait for the perfect man to sweep you off your feet and fix your problems, you should stick around and try to fix the 'beast' who abuses you, selling your voice to a witch for a stranger you never met is a smart idea etc etc). The barbie movies are better, especially some of the newer ones, but some of them still tend to be overly focused on fashion and looks rather then substance or have some other less desirable role models.
Now my niece is a smart 5 year old and willing to talk about things, so I would like to explain to her what part of these movies I don't like and why she should know that she can do more then what she sees in these movies. However, I find that I have trouble articulating the issues that are wrong with the movie in a way that she can easily understand.
For instance the other day she wanted to play snow white, which I told her I didn't want to because I didn't like the movie. She asked me why, but even while I tried to explain it she mostly seemed to not get why I didn't approve of the movie. She offered to play a different game any ways, because I said I didn't like the movie and she was kind enough to not want to make me play something I didn't like; but I feel I failed to take the opportunity to explain to her how she should aspire to more then being rescued by a prince.