Fill the special pen with water to complete reusable coloring and writing activities. Then let the page dry to erase the pictures and start again! The chunky pen is easy for kids to hold and stores neatly in the cover for mess-free cleanup! This package contains four 6x7.5 inch boards and one refillable water pen. Conforms to ASTM D 4236. Recommended for ages 3 and up. Comes in a variety of designs. Each sold separately. Imported.