out. >> reporter: there's more there. >> a teeny bit funnier. it's that highbrow comedy that pushes "icarly" over the edge. >> reporter: he says it's a challenge to figure out what kids will laugh at. >> i heard of a lot of writers who say, oh, you're writing for kids. kids will watch anything. that must be really easy. actually, it's kind of harder because your parameters are more narrow in what you can write for a kids show. sex, politics, religion, all that stuff you have to avoid. we can't make reference to what happened seven years ago because kids don't know what happened seven years ago. >> reporter: one of the last steps before final taping, a complete run-through where invited guests can watch from behind the cameras. and this is not canned laughter. >> woo! m nowadays, that's a cultural