For those who wonder about the usefulness of these and coloring mandalas, I recommend reading a very interesting article on the topic: [...]
Why only 4 *?
If the idea is excellent, this notebook has the same flaws as any other in the collection:
* No space between the center binding and drawing. The drawing occupies 100% of the page, which is not always practical.
* The quality of paper: besides the work crayons, it is often difficult to make the front / back pages.
* The size of drawings: some patterns are too small to be worked ... in pencil and felt raises the above problems.
* The quality of binding: I never do a full page at a time. Each book and open / closed dozens and dozens of times ... and the pages eventually come off.
These are just small details, but numerous enough to lose a star.