Oh great, now I'm hooked on Bookworm!

[Darren Dirt]

You Grew Up Playing Shoot'em-Up Games. Why Can't Your Kids?
^ I like the "LEGO test" idea.

[Thorin]

The LEGO test is an interesting rule-of-thumb.  I have to second the notion that if they're not old enough to play the game, they're not old enough to watch the game, either.  This means for the oldest in a family of four, say, that he won't get to play the gory games all that much as the little brothers and sisters are around most of the time.