During circle time I passed around a hand mirror. Each child took a turn looking at him/herself. We talked about our faces. We talked about our similarities (we all have a nose, a mouth, and two eyes) etc. And, what makes us unique i.e. "Trey has very blue eyes, Eleri has a small mole on her neck, Emmie has rosy cheeks..."
For art, I used colored paper to cut out a hand mirror shape. I gave the children markers to draw what they remembered about themselves.
Here is a sample: