Where's his movie about being a parent?

He made a movie about relationships (Modern Romance), about marriage (Lost In America), about Fear and Death (Defending Your Life), and about his mother (MOTHER). I thought for SURE when he had kids that we'd be seeing a classic Albert Brooks movie about what it's like to have young kids. It never happened.

It's still not too late for him to make one, even though he's getting to the point where it would have to be a film about having a child when you're getting to be an older man. But it's the one big topic I expected him to tackle and that he never really has. Seeing him interact with little kids could be hilarious, especially if he brings to it the same kind of edge that he brought to his earlier movies. I really wish he'd do that...