Slay a dragon, fight off sharks, put out fires--all at drawastickman. It's enormous fun. You can share your pictures afterwards. Or not.
All you have to do is draw a stick figure, then watch your little person caper about and get into all sorts of scrapes. The software will occasionally prompt you to help your hero out with another wee drawing--but there's no artistry required. A toddler could do this. Er, a toddler could probably do a better job.