Well, apparently they were back then and still are today for people of all ages.
Coloring books for adults is an offspring of art therapy which is a mental health profession that is the process of making and creating artwork which intends to "explore feelings, reconcile emotional conflicts, foster self-awareness, manage behavior and addictions, develop social skills, improve reality orientation, reduce anxiety and increase self-esteem" (according to the American Art Therapy Association). So basically, it's similar to good old therapy. Also, art therapy is not only about mental health and improving yourself - it's a form of personal expression, as well.
Here we have collection of Lego coloring pages. Show me the kid which do not like Lego! You can not find him. But you can find here the best coloring pages of Lego. Police cars and fire engines, ambulance car and trucks... all this super coloring pages are in this category.
Carrousel Stock Vektor Art und mehr Bilder von Comic - Kunstwerk - iStock
Fotos, lizenzfreie Bilder, Grafiken, Vektoren und Videos von Festlichkeit | Adobe Stock
Antikes Karussell 20 Reittiere Bastelbogen zum Ausschneiden Beim Verlag vergriffen - selten! | Bastelbogen, Karussell, Basteln
Nur Fliegen ist schöner: Fesher Kettenkarussell-Look uff der Dippemess (Teil 2) - Das Mode & Lifestyle Blogazine aus Hessen