here are 30 large (10.75x 14) pictures per pad; pink is for girls and blue for boys. As children color, different visual textures or patterns are revealed on each of the pictures details. Girls will color princesses, ponies, puppies, butterflies while boys color pirates, sports, castles, dinosaurs, and much more in each. The black line pictures are printed on heavier white paper so markers dont bleed through. Darker markers allow the pattern to be more visible water-based (not permanent), glitter, brush tip, fine tip, or even broad tip. Metallic markers dont work as well the pattern is either non-visible or very faint.