Help Rubble & Crew bow-wow build in this interactive storybook! Use the water pen to reveal images on every page.Rubble and his crew of construction pups find dinosaur bones in a park -- and then build a museum in town to share the dinosaurs with everyone!Fill the enclosed pen with water and reveal hidden dinosaur bones, pups, and construction vehicles on every page. When the pages dry, refill the pen and do it all over again -- the perfect mess-free activity for fun at home or on the go! Pup-tastic!