""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.