My 4th child who is 3 years old just potty trained this week. I can tell you from 4 kids of experience, my first who was a girl showed interest early and I did the books etc. I also got her a doll that also peed on its own little potty after you fed her water and she loved that. She trained, but since she was so young, she had to go to the bathroom often until her bladder grew bigger. By the second, he was older and at 2 1/2 I was concerned and had 2 stressful weeks to potty train him. The third, also a boy, I was determined to wait until he was ready, but by 3, I thought I needed to step in, he was scared to go number 2 and I had such a hard time for a month with him. I learned and with this last one, I did not say anything and completly waited and she decided she wanted to wear underwear and go on the potty and she trained herself. I used to tell everyone, potty training is the most stressful thing I had to do as a parent of a young child, now I realize the answer is to wait until the child is really ready to do it by themselves and they will. I hope this helps.