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Rex is a tiny tadpole who cant wait to grow up and be big like everybody else. Unfortunately for Rex, he livesin a prehistoric swamp . . . and everybody else is a gigantic dinosaur.With a little time--and a lot of patience--Rex does grow, gaining arms and legs and, most importantly, a personality big enough to take on even the mightiest of his neighbors.Includes a note from the author about metamorphosis, prehistoric frogs, and the environmental challenges frogs face today.,