Melissa & Doug On the Go Water Wow! Reusable Water-Reveal Activity Pad - Safari Activity book of 4 safari-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 and 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