My son was a 2 yrs and 9 months when he trained. We talked about it, and he said that he really wanted to. Then we continued to discuss it for about a week while I got organized, and he was so excited.
I used the Potty Training in a Day method, and it worked like a charm! We used a non-wetting doll (Elmo) with a potty seat, and he sat on the living room floor all day. I put down a $3 shower curtain and blanket on the floor to avoid "spills". We played together most of the day. That very first day he made it to the potty 5 out of 8 times (2 of the 3 accidents were at the very beginning of the day).
I wouldn't say that he was trained within one day, but by day 3, he was totally daytime trained. I never even had to remind him to go, he just walked in the bathroom, pulled down his pants, and sat down.
I know some moms have good experiences with this method and others don't. I'm sure it doesn't work for everyone, but I do think you have a higher rate of success if you follow the whole program instead of picking and choosing and leaving out pieces. I found the book at the Clermont Co library. I'm sure Hamilton Co would have it too. I was willing to put in one solid day of concentrated potty work but not willing to have a daily hassle for days/weeks on end. Thankfully it worked well for us.