Loy58: If you've already tried reason, a good next step might be role reversal. You could try to get her engaged in an activity she enjoys, then randomly change the rules, and start behaving like you've seen her do when she doesn't want to play it your way.

Then, come back later and talk about how she felt.

This step was never necessary for our DD, primarily because she got subjected to this kind of treatment by other kids, so we just reviewed those experiences as examples.