My best Kid offers here the water marker book in set of 2 Magic Aquarium and Dinosaur. It comes in many different variations , perfect for a birthday party from kindergarten friends to bring along. Fill the pen with water and the background becomes visible - with multiple use of the product. It contains 4 pages that children can color and reuse again. Since no paint is used, only water for coloring, it is completely non-toxic, providing magical fun for all kids.