Potty training

Well I've decided that it is time for Jacob to learn to go potty like a big boy. He already knows how to use the toilet for number one and two, But I want it to happen all the time. I told Jacob if he does learn how to go all the time, then he will get to wear big boy Elmo underwear. It so far has been going OK. For the past few days, almost every time I take him to the toilet, he will go number one. I just think that with time he will get better and better. I know this will be a little hard, but all I have to remember is that sometimes you can't learn something in just one day.