Now kids can paint amazing creations without the mess with this numbers themed Water WOW! Book from Melissa & Doug! Includes 4 reusable pages and a refillable water pen---simply use the pen to color in each scene and the details and colors will appear with every stroke. Let the page dry, and the pictures disappear---so you can fill it in again and again! Perfect for travel or rainy days, this book comes with a chunky-sized water pen that's easy for kids to hold and is stored in the book's front cover. Recommended for ages 3+.