Children are little explorers by nature and that is why we must not deny or obstruct their ways of expressing and researching. It is very important that we do not impose on children ways of drawing, because in this way we are obstructing them from expressing their inner thoughts and feelings. The children's drawing also represents an aid to therapists in achieving high-quality communication with children. Basic characteristics and particularities of disruption from the autism spectrum are presented in the paper. The gradual development of artistic expression, depending on the age of the child, where development phases of child's artistic expression are defined and described, is presented. The third part is dedicated to the symbols in children's art, which give us a deeper understanding of the internal state of the child, as well as its way of experiencing and expressing everything that surrounds him. The research is based on an analysis of the visual arts of a seven-year-old boy with autism spectrum disorder. The aim of the research is to study and analyse drawings of boys with a disorder from the autism spectrum in order to compare selected visual arts according to phases of visual expression. The results obtained can serve pre-school children's educators in enriching new discoveries about autism as well as the artistic expression of children from the autistic spectrum.