From Melissa & Doug, this coloring book features: 4 underwater-themed coloring boards and refillable water pen Reusable pages are white with simple line drawings when dry; reveal colors when wet Chunky-size water pen is easy to fill, easy to hold, stores in compact, spiral-bound book--great for travel Promotes fine motor skills, early writing/reading skills, and visual discrimination Ages 3 years and up; 6" x 10" pkg 3+ years Safety warning: Conforms to ASTM D-4236 Imported.