Which individuals have the greatest impact on the preschool-age client's drawings?

I believe that during the preschool stage of development is the parents; that is the father and the mother, and the child's teacher who have the greatest impact on what the preschooler chooses to draw. The child's siblings (sister and brother) on the other hand, do not have a great impact on what the child chooses to draw during the preschool stage of development.