Our amazing Magicolor technology lets children pick a marker, fill a scene, and see colors magically appear on the page--all completely mess-free! Ink in the four included markers is invisible anywhere else but creates instant color on the 18 pages of fun game and adventure scenes! As a bonus, the spiral-bound book's all-inclusive format comes with handy storage for the markers, making it great for travel! This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 2815-00-036-4642, indicating validated use in U.S. government and defense logistics supply chains.