On the bustling floor of the 1959 American International Toy Fair, a radical eleven-and-a-half-inch figure in a zebra-striped swimsuit is making male executives incredibly nervous. Unlike traditional baby dolls designed to train girls for motherhood, this daring new creation invites them to imagine entirely new futures for themselves. Step inside the controversial mid-century debut of a plastic icon that is about to rewrite the rules of play, aspiration, and American culture.