According to Wikipedia, there are four stages of child art:

* Scribbling - My son calls this "scribble scrabble," and it's a lot of what my daughter drew for the past year.

* Pre-symbolism - "From about age three, the child begins to combine circles and lines to make simple figures. At first, people are drawn without a body and with arms emerging directly from the head. The eyes are often drawn large, filling up most of the face, and hands and feet are omitted."

* Symbolism - "when a child draws a picture of a cat, they will always draw the same basic image, perhaps modified (this cat has stripes that one has dots, for example). This stage of drawing begins at around age five. ... Before this stage the objects that child would draw would appear to float in space, but at about five to six years old the child introduces a baseline with which to organize their space. This baseline is often a green line (representing grass) at the bottom of the paper. The figures stand on this line. Slightly older children may also add secondary baselines for background objects and a skyline to hold the sun and clouds."

* Realism - "At this stage, which begins at nine or ten years old, the child will lend greater importance to whether the drawing looks like the object being drawn."

My daughter is 3, and just started drawing little faces - yay for pre-symbolism! She still scribbles a lot though.

My son is 5 and definitely in the symbolism phase. He is really really into drawing, and takes it personally that I don't draw with him. So I'm gonna try to start drawing with him - plus maybe we can get him in some sort of drawing class.

Where is your LO in the 4 stages of child art?