Murry Bear has so many worries! Luckily, his sister, Molly, knows just what to do. "Sharing worries always makes them feel smaller," she says. She also tells him about her worry box. "When I'm worried about something," she says, "I write it down, then put it inside." Then Molly offers to help make one for Murray, and he takes it on their journey to the waterfall -- but will it really help?"