Use the "magic" no-mess pen to trace letters, color in a picture, and see vibrant colors, details, and patterns appear! Each page of the 24-page activity book for kids three and older features letter-themed artwork to complete and seek-and-find activities, too! The invisible ink marker only marks on the pages (not clothing or furniture!) and stores in the cover of the spiral-bound pad, so it’s a great travel activity. For more than 30 years, Melissa & Doug has created beautifully designed imagination- and creativity-sparking products that NBC News called “the gold standard in early childhood play.”