Sketchbook Ink is available in the Apple App store for the iPad. Whereas SketchBook Pro creates bitmaps, SketchBook Ink creates resolution-independent bitmaps. Think of MacPaint versus MacDraw. I drew this up in under a minute.
I call it Sheryl in Wind. I know what you're thinking - "My gosh Scott - how do you do it?" I admit the resemblance to my wife is uncanny. That's kind of the point. This app is fun. You don't have to be any good at it to enjoy it. If you want to see some examples from people who do know what they are doing.
Unskilled drawing is alive in the lab.