M.
I know it sounds a little weird, but my son loves stickers. He's 2 and almost 1/2 and at school they give them stickers when they go potty on the toilet. All the kids started sticking them on their foreheads and now he's addicted. You can get like 1500 for $1 at the dollar store. Don't worry if he doesn't get into potty training right off the bat. SOmeone once told me that it's not like he'll be starting high school still in pull ups. They get it in their own time and soon he won't want to sit in his own pee or poop anymore. :) Good luck!
Mare