L.M.
My daughter is 4 and I just got her out of pull-ups at night by getting her up before I went to sleep and asked her if she had to go to the bathroom. I also, had her change her panties, clothes and bedding so that she knew the hassel that I went through to get her to realize that it is a pain. She also has learned when she has to go so she gets up to go anywhere from 11 to 2 at night. He will get the hang of it with time, he has to be ready to do it.