Jonah: Mommy, where is your car?
Me: Home. I walked here and we are going to walk home.
Jonah: What? It is too hot to walk home.
Me: I'm just kidding!
Jonah: What does just kidding mean?
Me: Well, um...well, it means what I told you wasn't the truth but it was a joke.
Jonah: So you told me a lie. You told me a joke lie? Mommy, I think you aren't supposed to lie. Even a joke lie is a lie. Are you gonna tell daddy you told me a joke lie? He won't like that. He doesn't like lies even when they are jokes.
Point taken, son! Point taken!