You have to put him on the potty with a book, play a game or reward him once he potty's. The first time he goes on the potty, going in the diaper will be "yuckie" to him.
Learn his potty routine. Mine has to potty every morning the second he wakes up. When his feet touch the floor I make him go straight to the bathroom. Try doing that. Early in the morning is the best time, because they've gone 8 hours without going (unless he pee's in his sleep).
My 3 year old is fully potty trained now. He's been trained since right before his 3rd birthday. He sleeps in big boy undies now and ALWAYS wakes up in the middle of the night if he has to go. He goes on his own and runs in my room with his undies to get them back on after he's done then runs back in his bed. It's truly wonderful.
Good luck on your journey!!
at 1:10 PM on Oct. 24, 2010