This conversation just took place in our living room:
Emily: MOOOLLLLYYYY ... that's my folder. Give it back.
Molly: No.
Emily (starting to whine): Give it back.
Molly: No.
Emily (holding up a fist): Do you want this knuckle sandwich?
Molly: Yes.
Emily (stomping her foot): You HAVE to say PLEASE.
Molly: Okay.
Emily (holding up her fist again): Do you want this knuckle sandwich?
Molly: Yes, please.
Emily (smiling): Good girl.