Yep, and they need to be reactive, in-context - not a cold setup.

It's about trolling your kid, tripping up their train of thought.

Puns are an approach - but it's not the pun itself, it's a:) finding a relevant one in realtime and b:) the facepalminess of actually doing so, here, in the middle of an ostensibly serious conversation, then standing around pulling this face.

But more common and usually more effective are unjokes, context switches and category errors.

Q: What has five toes but isn't your foot?

A: My foot.

"Wait, so is this your street here?"

"Nah, it belongs to the council."