I introduced the potty few months ago, and Marlee has been potty-learning. Basically, we're just getting used to having a potty in the bathroom, talking about what it's for, and occasionally sitting on it. She's peed in it a couple of times, and even pooped once, just because I caught her in the nick of time.
Today I was emptying the dishwasher when I heard her in the bathroom. I went in, and she was sitting on the potty, fully clothed, cleary concentrating on her business. I said, "Marlee, are you pooping?" She nodded, then clapped her hands and said, "Yay!"