Writing for children is a different genre than writing for adults, but not a lesser one. See Mark Twain's Huckleberry Finn if you doubt me. Younger children, despite what you may have observed, are generally more polite listeners. They still love story time. They'll go along with your game.
Older kids are more standoffish.
You can choose to lampoon baby art and you'll probably get some laughs, but that's the comedy of cruelty. Bring the kids up to your level, but make it the level of a grown-up kid. Be playful and irreverent without being sentimental or condescending. They won't get it, and if they do, it's still not clever or funny. Watch any current TV superhero show for an example of this terrible writing.