Floss and Rock's Magic Water Reusable Color-in-Cards are perfect for mess-free learning fun at home or on-the-go! Fill up the pen with water and color in the pictures or follow the outlines to magically reveal the designs, words and numbers that then slowly disappear. The 10 included cards are reusable so that your little one can enjoy revealing the unicorns, castles, stars, numbers and more over and over again, and the cards are packed in a convenient carry case so that they can come along for coloring playtime fun anytime, anywhere!