First-grader Missy pushes the bounds of her imagination--and her older brother Mason's patience--as she lays out her plan for a new pet. A must-have for fans of Charlie and Lola and Olivia or anyone crafting a case for why they need a new animal addition to the family. At the Museum of Natural History, first-grader Missy has a genius gigantic idea: she wants a wooly mammoth as her new pet. She'll name him Malcolm. They'll...