Using this water doodle book is easy. First, fill the water pen with water. Then, simply draw or color within the lines on the pages. As you use the water pen, the colors will appear on the paper, showing amazing royal scenes. After the water dries, the page goes back to normal, so you can use it again and again. When using the water pen, make sure not to over - fill it to avoid spills. Keep the book away from sharp objects to prevent tearing. After use, store the water pen and the book in a dry place to keep them in good condition.