This set includes four reusable underwater-themed coloring boards and a refillable water pen. The pages feature white backgrounds with simple line drawings when dry; colors appear when wet. The chunky-sized water pen is designed for easy filling and holding, and it stores neatly in the spiral-bound book, making it travel-friendly. This activity supports fine motor skill development, early writing and reading skills, and visual discrimination. Suitable for children ages 3 and up, it offers hands-on, screen-free play. The product is made with FSC-certified materials (FSC C156584), ensuring responsible forestry practices. Ideal for preschoolers, it also serves as a practical gift option.