good book drawing for children

my two children (under 5 years) love to draw. the zapbooks are an economical solution ideal for leisure. So they recognize each of their specifications by the cover color.

The spirals make it possible to every page flat, which facilitates hand movements (compared to the coloring book that must be the page with one hand, even an elbow).

Compliant paper (thick enough to draw with crayons). The colors do not transversent on the back page.

Only complaint is that sometimes (often) the cover out of the spiral structure. I have to give it to avoid distortion specifications.

Purchase a re-do.