No-mess painting for kids! This exciting paint-with-water coloring book include a refillable water pen. Simply use the pen to color in each scene--details and vibrant color appear with every stroke! Then let the page dry to erase the pictures and fill it in again and again. The chunky-sized water pen is easy for kids to hold and stores neatly right in the front cover, so Water WOW books make ideal travel activity books for kids!