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.
When you sit with your child and see him coloring on a book, you feel completely relaxed. Colors are all that you need to relieve your anxiety, depression and even stress. There is a sudden change in the mood of an individual, when he exposes himself to different shades of different colors. One look at red, purple and green shades and you are emotionally out of all the problems in your life.