We have now been accident free (during the day) for almost a week!!! Joy now tells us when she has to go potty. She got to pick out her very own pack of panties from the store and she was very thrilled.
What really worked? Probably a combination of things. Hubby and I totally tag-teamed to get her to the toilet all.day.long. Then we did dorky things like sing and dance crazily after she would go in the toilet. Can you picture us singing "Happy Poo Poo to you... " blowing out candles, and clapping our hands loudly in the bathroom daily? Yeah, that's what we did. And it worked.
So, now you know.