Good to hear this, my step son is 14, hoping to get him hooked on this, so he can help develop levels for my game, whilst I make the content, ha ha.
I see in the Q&A section a worried parent about gore/child friendly version of this, but I think it is pretty child friendly, it is only going to be super gory, if they design it that way, and if their mature and intelligent enough to design a game to be gory, then they are going to be intelligent enough to seperate the real world from a computer game.
How many kids play Grand Theft Auto with out their parents knowing, I know I defenetly did when I was younger! And thats a lot worse!