Using this water doodle book is easy. First, fill the water pen with clean water. Then, use the pen to color within the lines of the forest animal illustrations in the book. As you color, the pictures will come alive with colors. It's a fun way for kids to learn about words and colors. Remember to keep the water pen away from small children who might put it in their mouths. After use, dry the pen and store the book in a dry place. This will help keep the book in good condition for a long time.