The Santa's Tree Water Color Wizard Books are an exciting addition to your child's collection. These unique books feature water-activated color changing pages that will captivate and engage young minds. Each book comes with a convenient water pen, allowing children to easily bring the illustrations to life with vibrant colors. The book itself is made of durable plastic, ensuring that it can withstand the enthusiastic creativity of little ones. Measuring at 7 1/2" x 5 1/2", it is the perfect size for small hands to hold and explore. The accompanying pen is 3 1/2" long, making it easy for children to grip and control. With the Santa's Tree Water Color Wizard Books, your child will embark on a magical journey of creativity and imagination.