I agree with strong arming it the way that SMW suggests, and yet I also see that Ian has made a really good case for being the "sane", responsible one. I guess that I would try that first (darn) and if that doesn't make a dent in that tiny brain of hers, I would threaten what SMW stated. Of course I'd just threaten her with it before I actually called anyone else in. No use in traumatizing your daughter if a threat can do the trick.
Don't ya just want to give her a good smack? I do....