"“Let's play mermaids,"" Camille says one hot day. The WellieWishers imagine an underwater world full of colorful coral reefs and friendly sea creatures. When Camille and Willa discover a sunken ship, they have a great idea for surprising their friends—then, Camille comes up with an even bigger surprise! Will the others help her pull it off? Includes tips for creating fun and easy surprises for kids.