The Color Counts Series uses the same numbers for each of 36 different colors - so number 27 in one book will be the same color in all of them. The color scheme is printed in the front of each book, so you can match your crayons or colored pencils accordingly. Coordinates with Mindware's Color By Number 36-Colored Pencil Set (sold separately); can also be used with your own coloring tools. Original, hand-drawn illustrations will reveal fantastic hidden details as you color. Plus, you can add sparkling accents with the included glitter pen. Once you've completed the numbered designs, try the un-numbered version of the illustration to add your own unique style. Features 22 perforated pages, including 8 fold-out pages that extend to 10x15".