I'd like to start potty training my son (three years old). We've had the potty chair for a while, he's sat on it before (usually before baths), but more to get him familiar with it rather than seriously using it. How do I get him to sit on it when he needs to? He's never communicated to me when he needs to go, so I've tried to catch him in the act. I don't want to sit him on it too often, as I don't want him to get tired of it. He always grunts before pooping, but for a while now he'll hide in his bedroom during the process. I tried going in today when I heard him grunting, but he didn't want to go with me into the bathroom, just got upset and hid in the closet. He seems to be embarrassed by it. How do I talk him into using the potty? Keep in mind he doesn't talk much. Not entirely sure he understands what the chair is for. We do have him in training pull ups already, as they fit better than the diapers he was using and he likes pulling them up instead of having to lie on the floor for changing. Any training advice? What's worked for you?