Best New Children's Book on Women's History

What 2011 children's book that looks at women's experience in history (including biographies) was your favorite? What would you recommend to someone buying a book for a child to get them interested in women's history?

To count, the book's initial publication date must be within 2011, and must be listed by the publisher as for children or young adults. Nominate one to three books, and say why you think each is best.

_{Next category: Most Admired Woman Today
More nominations: 2012 Readers' Choice Awards for Women's History}