K.A.
Hi,
I'm a 50 year old grandma of three and have potty trained a lot of kids, around 30 to be exact. They are all different but here is what I did. Some may approve, some may not. For the boys, including my son (who was potty trained at 18 months). I always made a happy game of it. I got him a big boy potty and put it in a special closet in the bathroom and he like going but sometimes he would be playing and he wouldn't want to stop...so I got the idea to use a coke bottle for peeing. I'd say, "Fill er up" and he'd laugh. Then we'd mark on the bottle how far he filled it. Next time he'd try to go higher. It was funny and fun and he never used pull ups. They didn't have them anyway. Pooping in the potty was never a problem. He didn't want to get it on him.
Hope this helps.
I think to that a child has to be communicating well. Johnny could say (believe it or not), sentences at around 18 months too. People would ask how old he was and he'd say, "I'll be two in July".
My second child was a little harder to potty train, but when the time is right she was fine. She was two.
Hope this helps.