In this story that introduces the fundamentals of addition and the concept of doubling, a swamp becomes quite crowded as the number of dinosaurs doubles each time, from one to sixty-four.

"Follow a lovable T. rex throughout its day as it plays peekaboo with a tiny dinosaur friend."--Provided by publisher.

"Welcome to the Mechazoic era, home to the Dinotrux! Tyfaces danger at every turn in this action-packed storybook-- first from an erupting volcano, and then from D-Structs, the giant T-Trux who is definitely not friendly! While Ty doesn't stand a chance against D-Sructs on his own, he realizes that he can stand up to him with some help from his new Dinotrux friends. It's a great day for teamwork in this fun and exciting storybook that will be a must-have...