My daughter was 18-months and ready to potty train before I was ready to deal with it (she would tell me she had to pee-pee, so I knew I had to do something) For the most part she did good going #1 in the potty, but for some reason she was affraid to do #2 in there so she would poop on the floor in front of it, or wait until I put a pull-up on her. we tried everything under the sun...sing, dance, praise, sticker chart, musical potty, etc. Nothing seemed to work. My friend told me that she potty trained her daughter in 4 days!!! she gave her dum-dum suckers. I was hesitant about all the sugar but i was despirate. I decided to give my daughter jelly beans instead.(they're small, not real messy, and can be eaten fast) She would get 1 for peeing and 2 for pooping in the potty. I also took some to her daycare. I kept them in a clear plastic jar in the bathroom(for motivation)Believe it or not she was trained in 1 week. And winging her off the candy was not that hard either. somethimes she didnt ask for it, so I didn't give it to her. Until it was completely out of her mind (i also put it on a higher shelf, out of sight out of mind)
I hope this helps, good luck