Painting will be very helpful for people with post-traumatic syndrome, or those who are constantly in a stress state. The fact that such activity calms the amygdale, i.e. the area of the brain that is responsible for generating emotions. When you focus on coloring pictures, you give your brain a chance to rest and relax.
It is good to give the child to paint a picture from memory, or paint in the opposite color sample, for example, when there is a ready-made picture of a night scene, but the child should paint the daily events of the same characters, etc.