Potty Training

So we officially had to move up to size 5 diapers for Adam just recently. The size 4 lasted him a long time, but they were starting to leave red marks around his legs and I knew that they were getting too tight for him. We have bought a potty for him and have actually sat him on it several times, but nothing has come out and he won't sit for very long. He has started saying the words, "I pee" a lot more, but by the time I get him to the toilet, he doesn't do anything. I've already figured out though that Adam is the type of child that he has to learn new things on his own time table. He hasn't always been the typical child when it came to development. He didn't crawl well until he was about 8 months. He didn't pull up and walk until he was a year old. He really didn't speak clearly until he was 2 years old. I think potty training is going to be something that we are gonna have to take one step at a time and be patient with. We bought the Elmo Potty dvd at Walmart and he really enjoys watching it. I was reading in the little manual that comes with it that some kids take longer and you just have to be patience with them because you can't rush them if they aren't ready. I really feel that's the approach we are gonna have to take with Adam. So for now, we will continue putting him on his potty when we goes to the bathroom with us and just cross our fingers that he learns how to use the potty soon.