Watercolor

I'm currently preparing a watercolor demonstration for a group of homeschooling students. I wanted to see how long it would take me to do a quick watercolor painting from a photo. I have an hour in which to demontrate and teach the color wheel and blending, painting from a photo or still life, and finally some fun tricks and techniques.
I timed how long it took to paint this portrait. About 26 minutes. I didn't time the eye painting, but I'm guessing it was slightly less time.