When I searched this on Amazon, I didn't find many helpful reviews. So I bought the book and decided to write one myself.
The book comes with a blue gel pen, which is conveniently strapped on a elastic band on the cover of the book.
Inside the book, there are pictures with light, gray lines. Those are pictures that you can trace and add more stuff onto it. For example, the very first page is Gray=Play. There is an example of a fish with spikes and a "pierced ear". So even if you are artistically challenged, you can trace over the lines and embellish them. There's also a page "Name Doodling." You can inscribe your name in a jillion different ways on two blank pages. If your mind suddenly becomes blank, there are so many different examples that border the pages. Some pages are blank with a saying. I'm guessing that you can doodle whatever you wish on there.
This book is really good for traveling, especially long airplane rides.