B.G.
My doctor told me pull ups are a waste of time and actually confusing to the child. I would try taking him to the store, letting him pick out big boy underwear, and then wear those instead. He just might hate the feel of the pee pee when it runs down his leg as opposed to the pull ups.
Of course my daughter is only 2-1/2 so we really just have been trying to potty train and she pees in her new panties and couldn't care less about running around wet. I'm kinda a believer that when they are ready they are ready..... Good luck!!!