Researchers and educators have found that people retain 20% of what they hear, 50% of what they see and hear, and up to 90% of what they see, hear, say, and do. The Amazing Action Alphabet and The Number Neighborhood books are successful because they use a combination of all three. The books are perfect for preschool age children, children who are learning letters and sounds, children learning their number names and number values, children with specific speech difficulties, and children learning how to read and write.