After Jewish fifth-grader Ava and her Muslim best friend Nadeem are called hateful names at school, Ava's Granny Buena rummages in her closet and pulls out a glittering crystal button box. It's packed with buttons that generations of Ava's Sephardic ancestors have cherished. With the help of Granny's mysterious cat Sheba, Ava and Nadeem discover that a button from the button box will take them back in time. Suddenly, they are in ancient Morocco, where...