2, 4, 6, 8, math with dinos is so GREAT This Step 1 early reader will introduce the fundamentals of addition and the concept of doubling. First there's one dinosaur, then two, then four... keep up the doubling and there will sixty-four dinosaurs before the story's through. The dinosaurs like to stomp and play, but they seem to keep multiplying. This math reader is a great introduction to the concept of addition and doubling. Step 1 Readers feature big type and easy words for children who know the alphabet and are eager to begin reading. Rhyme and rhythmic text paired picture clues help children decode the story.