B.K.
Here is what worked for me, and you may think I'm nuts, but my cousin recommended it and it worked (at least for pee). Let him run around naked. He will pee on the floor once or twice but afterwards he will run to the potty when he has to pee. Then for poop what worked was pants but no undies or diaper. My son pooped his pants a couple of times and that was it. Remember, boys take longer. Make sure he's ready and shows an interest first. My boy didn't get totally potty trained until he was almost 3 1/2 years old, which turns out is the average age for boys. Good luck!