This was a purchase for my four year old son who loves hidden picture educational books. This book is advertised as being for ages 6-8, which is older than my child, but based on his previous experience with hidden image issues, I wanted to give it a try. The book is 320 pages long (including the final answer part) and resembles a telephone book. I can say that 80% of the pages are dedicated to exercises like hidden pictures. It's basically a 7 x 7 inch square image (a nice colorful image of an