Melissa & Doug Water Coloring & Painting Book,  (Water Wow Animal - On the Go Travel Activity) Animal-themed coloring book includes four reusable pages and a refillable water pen This animal-themed book includes four scenes to color, and a search-and-find activity for each scene Chunky-size water pen is easy to fill 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 and travel toys for kids