Saint's Row

Has anyone played the demo for Saint's Row?  In the first 5 minutes, I witnessed, in graphic form, a lot of violence.  Then I was recruited by a gang, which initiated me by kicking my ass, then I had to shoot other gang members and steal hos for someone else to make money.  What's weird is, and this may have to do with the late hour I played the game, but my 2 yr old son watched the entire thing.  He has a short attention span, so I was really surprised at this.  What was it about the game that was so interesting to him?