Now that Simon is almost three, we're trying a little harder to convince him that pooping in the potty is a good thing. Zac had the idea to up the ante: the reward would be a little hotwheels car instead of gummy bears. I bought a bunch at the store, and Zac prominently displayed the packages in the bathroom. We reminded Simon at every opportunity the benefits of pooping in the potty.
A couple days later, he was in the bath and suddenly declared that he needed to get out. Zac figured out that he needed to poop, and put him on the potty. Wha - la, Simon pooped in the potty. We lauded him and gave him his first poop car.
(It's two weeks later and he hasn't done it again - but we've been out of town, so we're hopeful the progress will resume.)