W.A.
If you havent started trying yet..I'd start introducing that potty now before it becomes an object he is scared of. I started putting my daughter on the potty every night right before she took her bath since 9 months cause I was aftraid she'd become scared of the potty like lots of my friends kids. I never pushed or anything just let her sit there before bath time..Try starting that way with him, just so he gets used to the potty being around. After he seems used to it and is not scared of it..try putting him on it during times ofthe day when he generally pees and poops... eventually he will surprise the both of you and pee or poop in it and the bigger and better the excitement is and the reward he gets that first time the more likely he will go and go an get better and better. Lucky for you that you have a boy cause teaching them to pee standing up is the easiest thing when you use targets. What little boy doesnt want to pee at something. They sell flushable targets but with all the daycare boys and family I have helped potty train..Cheerios is the way to go..throw some in there and tell him to shoot them. No matter how you do it..it's definatly time to start introducing him to it now. make it fun,. dont get upset when he has an accident and just keep at it..it will work out. My daughter just turned 2 last week and after a long while of getting her used to it..she is just about done with this phase.thank goodness I am 5m onths pregnant with the next kid...LOL.
P.s. As for pull ups.. I felt it was a waste of money cause my little girl figured out they pretty much were diapers too...so go get some cool boy underwear and some plastic cover pants and go with the "dont dirty your cool underwear" approach. GOOD LUCK!!!!