What is the difference between big and small? How are big, bigger, and biggest different? Young readers will discover the differences between these opposites and more in Science Kids- Big and Small. Big and Small is part of the Let's Read collection of media enhanced books designed for children ages 5 to 7. These books were created to inspire beginning readers to become independent readers. Educator and reading expert Dr. Edward Fry created a list of 1,000 instant sight words.These 1,000 sight words must be learned by students in elementary grades. By the Third Grade,students are expected to instantly recognize the first 300 of these words. The Let's Read books combine these 300 sight words with vivid color photography and non-fiction content within a Kindergarten to Second Grade curriculum framework. Big and Small is an AV2 media enhanced book which gives readers access to embedded weblinks, audio and video clips, activities, and other features, such as matching word activities, slide shows, and quizzes.