Recommendation for book about feminism for girls?

I am a college student and I read Jessica Valenti’s book for my intro level feminism class this semester.  I LOVED the book, but I am looking for something a little less…profane for my younger cousin. She is struggling to stretch her feminist wings in our conservative family and I’d like to send her some good reads for the holidays that are age appropriate. Any good suggestions for a 13-year-old girl? Thanks!