This is a 90 page coloring book with 45 illustrations to color. Sheets are one-sided for a perfect coloring experience! This is a great way to teach children the different animals around the world! Some are domestic, some are wild animals from the jungle. A big variety to please everyone! There are samples on the back of the coloring book to represent what is inside. This book makes a great gift! You can use crayons, color pencils or gel pens to color. It is recommended you put a blank piece of paper behind the picture you are coloring if you are using gel pens. We hope you enjoy your coloring book!