Well, apparently they were back then and still are today for people of all ages. People are making the adult coloring books bestsellers on Amazon! At the time of this writing, eight of the top twenty books on the bestsellers list, are coloring books for adults. There must be something behind this recent growth in interest.
Portability: Such products have to be portable. Whenever you get the time, you can do this activity. To your surprise, there are many people that carry these books to their offices as well, so that they can use them or do a little bit of coloring whenever they are on tea or coffee breaks. It helps them relax their office stress. Available in various colors: From black to white, from peach to pink, there are different shades in which the portable books are available. Once you go through the entire gallery, you can select the best one for yourself from the list. Right when such a thing is delivered to you, the activity can be started whenever you are ready.
Determine your childs level when it comes to coloring. Some color books provide large coloring spaces making it easier for children to color the page, stay in the lines, etc. As the child gets older, their skill level for coloring increases as well, and the difficulty of the book may as well. Some coloring books come with written instructions, and other games, such as a dot to dot, or a maze. If you want to keep your child happy, and still challenge them, choose coloring or activity books in their range or level, and do not frustrate them with books that have too small of pictures, or too many spaces to color, or written instructions.