With my oldest son, we started a sticker chart, essentially using shaping to get him to use the potty. At first, let him have a sticker just for sitting on the potty. Once he gets good at this, make the reward for sitting and trying, then for producing "results." Don't change the behavior required for the sticker until he is doing it consistently (at least one week). When our son no longer saw stickers as rewarding, we then made it so after he got one sticker, he got a hot wheels car, then it was two stickers, three stickers, so on. We added the extra incentive that he got a hot wheels track when he filled the entire chart. It took about a month, but when he was done with the chart, then he was fully potty trained. I do want to note that he was nearly three, though, and little worked for him prior to about 2 and 3/4 age. Also, just a warning, it seems that pooping on the potty is more difficult for most kids and takes a lot longer. My son had mastered peeing on the potty for nearly two months before he would poop on it. He just waited until we put him in a pull up at the end of the night and go in that. I wish you luck! I think potty training was one of my biggest parenting frustrations, cuz you can't make them do it :)