If you are going to be painting several children, have them sit on high stools, preferably with backs. A proper working posture prevents back complaints.
If children have skin irritation or small cuts on their faces, you can also do the painting on the hand.
Children like it when they can watch the make-up of their face in the mirror. This will generally ensure they are less easily distracted and are more likely to sit still.
Grimas Water Make-Up (Pure) can be used around the eyes, but children often do not like it when brushes are so close to the eyes. So decide yourself how far you want to extend the colour. When working under the eyes, have your model look upwards - only with the eyes, without moving the head. If you work above the eyes (eyelid), have your model close his/her eyes in a relaxed manner. Children are inclined to shut their eyes tight. Then you can say: keep your eyes closed as if you are sleeping.