Books for conservative young girls to open their perspectives

A couple weeks ago I saw a great thread asking for books to trick their conservative parents into being more progressive.

I’m here for a similar question: I have two nieces and would love to get them a book they will not only enjoy, but will open their perspectives to more that what they are just taught by their families, without being so in your face. I want them to challenge the things they are told to believe and form their own thoughts and opinions.

They are 12 & 13. Very much, “it girl”, TikTok girlies that love make up and cheerleading, sports etc.

Help!