Coloring books that teach reading will help your child read simple words and short texts. They train your mind and prepare to learn to read and write, develop hand for writing, memory and perseverance. Coloring trains how to count.
In the process of painting you focus your attention on a subject that is at your fingertips. If you do it with enough concentration, it will ignore the extraneous noise, unpleasant thoughts and worries. This is a very useful skill that will be useful in situations where you need to briefly forget about your physical or emotional pain.