Set the Tomy Disney Princess Aquadoodle drawing mat on the table or floor where it's ready for creative fun. Don't worry about errant pencil marks or spilt paint - the drawing pen contains nothing but water. Kids can use the pen to draw freelance on the mat, or they can roll the Cinderella figure to create a trail of hearts. When the mat dries, the drawing disappears. Fill the pen with water to start the fun.