Frankie Pickle’s latest adventure catapults him 200 million years into the past!After visiting the natural history museum with his family, all Frankie can think about are dinosaurs. He becomes so obsessed that he convinces his classmates to help him dig for bones at recess. But before they have a chance to start, the older kids chase them off the grass field, claiming it’s theirs according to the “Law of the Playground.” Frankie isn’t ready to go away without a fight, and he challenges the older kids to win ownership of the field. In Frankie’s imagination, it’s Cavekids versus Dinosaurs in an all-out battle for the playground…that results in Frankie and his friends getting pummeled.

Still determined to win back the field, Frankie invents a new game to lure the older kids away from the grass and onto the concrete area of the playground. His plan works, but the game he created is so much fun that not even his friends want to play in the grass anymore! -- From Amazon.com Product Description