This activity book features reusable white pages with simple line drawings that reveal colors when wet. The included chunky-size water pen is designed for easy filling and comfortable grip, suitable for small hands. Its compact, spiral-bound format makes it portable for travel. Recommended for preschoolers ages 3 to 5, it provides hands-on, screen-free play. The product is made with FSC-certified materials (FSC C156584), supporting responsible forestry. Note: FSC certification applies to new inventory only.