This Series of 6 Progressive readers is ideal for young children who are eager to begin sounding out words and reading, either on their own or with the help of a Parent. Book I begins with a very basic vocabulary, and each subsequent book in the series adds on to this 'core vocabulary' and repeats many of these words. The fun-loving twins Paul and Mary are the heroes of these stories which depict many enjoyable childhood adventures. The clear, colorful illustrations provide a valuable reference tool for children to learn to recognize key words. Look inside the front page of this book for more information about these progressive readers - a proven method to help children progress quickly in their reading.