What is the Triassic Period? What does it have to do with dinosaurs? Take a trip back in time to 250 million years ago to learn the answers to these questions! Kids will learn about life in the Triassic Period and how it has impacted the world today. Level 1 readers are aimed at children who are starting to recognize common words and are capable of sounding out unfamiliar words. Short, simple sentences help guide the reader through new concepts and ideas.