Eventually the person acquires a body and later even such details as a neck, ears, clothing, buttons, zippers, etc. The social maturity of the child can be identified by the degree of development when drawing a person. The child's use of color and pattern share a similar evolution. Simple one-color images make way for distinctly contrasting primary and secondary colors. Patterns that begin as bold, seemingly random scribbles eventually evolve into more carefully planned rhythms.
All children are artists.
Expressing the world through images, colors, patterns and rhythms is as natural to human beings as is the ability to walk or talk. Art is important to the development of the young human. It is the way the child learns to express the world and it is how the child learns to alter the world. You don't have to teach a child to paint. All the child needs are the tools, the time and the acceptance.