We have been potty trained (pee) since December, he's 3. He will tell us all day long if he has to pee but he still won't poop in the potty. He wears a diaper to bed still so he usually poops before he gets up in the morning or he will just poop in his underwear and then he will tell us he has to go. He knows where it goes, he knows he should go in the toilet but he just won't. We've had 2 times that he's actually gone in the toilet and we can't get him to do it again. Any ideas? He loves to play Mario Cart and I tell him if he poops in the potty today he can play but he still won't do it. I have tried rewards, I have tried encouragement, nothing is helping. Please help me get this boy to poop in the toilet.