Read and find out about dinosaurs big and small in this colorfully illustrated nonfiction picture book. Some dinosaurs were big. How big? As long as four school buses in a row, as heavy as sixteen elephants. Some dinosaurs were small. How small? Read and find out in this clear and appealing science book for early elementary age kids, both at home and in the classroom. This is a Level 1 Let's-Read-and-Find-Out, which means the book explores introductory concepts perfect for children in the primary grades. The 100+ titles in this leading nonfiction series are: hands-on and visualacclaimed and trustedgreat for classrooms Top 10 reasons to love LRFOs: Entertain and educate at the same timeHave appealing, child-centered topicsDevelopmentally appropriate for emerging readersFocused; answering questions instead of using survey approachEmploy engaging picture book quality illustrationsUse simple charts and graphics to improve visual literacy skillsFeature hands-on activities to engage young scientistsMeet national science education standardsWritten/illustrated by award-winning authors/illustrators & vetted by an expert in the fieldOver 130 titles in print, meeting a wide range of kids' scientific interests Books in this series support the Common Core Learning Standards, Next Generation Science Standards, and the Science, Technology, Engineering, and Math (STEM) standards. Let's-Read-and-Find-Out is the winner of the American Association for the Advancement of Science/Subaru Science Books & Films Prize for Outstanding Science Series.