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