Quack

Thing Two (while playing doctor): Here you go. Take some of this.
Me: Is this medicine?
Thing Two: Yes.
Me: Oh, good. I should feel better soon.
Thing Two: No, you won't.
Me: Why not?
Thing Two: It's poison.

Just a taste

Thing One (while making squash chips with me): Can I taste this flour?
Me: Yes.
Thing One: It's not poisoned flour?