Thomas the blue train works all day while Percy the green train works all night. Told in the simplest language, here is a charming tale of what they each do. Perfect and portable for toddlers and their caregivers. Bright and Early Board Books are super sturdy, simplified board book editions of classic Beginner Books. First launched in 1996, they have introduced millions of toddlers to beloved books from Dr. Seuss, P. D. Eastman, and other author-illustrators, in a format just right for young readers!