My earlier answer is below, but I just remembered something! My sister-in-law had a great idea with her daughter for potty-training and I sure wish I had thought to do this with my younger son. She dressed her daughter in a dress (Well of course, I wouldn't have done this part with my son!) with nothing on underneath. She gated herself and her daughter into the kitchen for the entire day. She baked cookies, cakes, and dinner, while her wee one played with all the toys that she had set up for the day, for her daughter in the kitchen. She had several little stations set up so they could just remain right there in the kitchen all day, for easy clean up when Emily did have an accident. She also had the potty chair right there for Emily to use. It worked! She said it took both days of the weekend, but it worked! My niece was potty trained within those two days of hanging out in the kitchen with momma. Quick and easy! (Lucky her!)
Okay, here's my old answer I sent you earlier......
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This one is a toughie. My older son was potty trained very soon after his second birthday. My husband brought home the potty chair and said: "Cooper, would you like to use this potty chair and go to the bathroom like Daddy does?" Cooper responded very enthusiastically; "Shooooah!!!!" (Sure!) and he meant it. He was trained in no time. Our second son, however, was not potty trained until he was four years and three months old!!! It was pure stuborness on his part. We tried everything..... stickers, candy, awards.... nothing worked, so we actually gave up. Then one day, he went into the bathroom on his own, closed the door, wanted no assistance, took his diaper off, used the toilet, not the potty, and told us he was ready to wear underpants. (LOL!!!) And he is the smartest kid, really! Very bright, does well in school and all that. We did reach a point where we just gave up and let him wear the diapers and pull-ups until he was ready. It was fine with us. I do think it also had to do with the fact that he couldn't be bothered because he was always so busy and so into what he was doing...... playing. Good luck to you though. Just wanted to share my two experiences with you. I believe it was Dr. T. Berry Brazelton who said: "If your child is five years old and in diapers, then he's five years old and in diapers. He will not be going off to college in diapers. Relax." Or something like that anyway. :)