Bright, graphic, cut-paper illustrations, cheerful rhymes, and fun-loving animals combine to build vocabulary and teach early readers colors, numbers, and animals. The four most commonly spoken languages in the United States—English, Spanish, Chinese, and French—are seamlessly introduced through numbers and clever design, as a paintbrush-wielding porcupine guides children and their accompanying adults on a colorful adventure of discovery. Guess Who is behind the Door has the capacity to grow along with your child for many years.