Developmental art therapy is a used with children including those with physical and intellectual disability. It has a long history in art therapy. Developmental art therapy crosses with Occupational Therapy in some respects, for example in helping children develop functional grasp and develop hand strength through the artistic process and handing of art media. Developmental art therapy also addresses cognitive development such as understanding cause and effect through mark making or through making impressions in media such as clay. At a more advanced level it can assist children in understanding the concept of representation.