J.
A friend taught me this, and it worked great when my older son was 2 1/2 and just potty training. I told him that if he pooped in the potty, he could blow out a candle and we'd sing the "happy potty day" song. It took a few days of just talking about, but then he finally pooped in the potty. I lit a birthday candle, we all sang the song (same tune as happy b-day), and he blew out the candle. He LOVED it. We made it like a big celebration, after that he pooped in the potty everytime.