Movies

It's a different tone and palette than the other movies, but kids need to be exposed to all types of film.

For reference, I took my eight year old to see Iron Man back in 2008 as her first "grown up movie" as part of her film education (I work in the medium to a degree, so they've gotten years of layered exposure to stuff). This year is the ten year anniversary of the film and Marvel Studios works proper and she was so excited to see this that it became her favorite movie of all the Marvel stuff now. These films are very good for introducing a lot of different types of stories.

There's lots of great characters of both genders here that stand out across the board. It'll be a great experience, especially if you talk about it afterward.