R.L.
hi L.,
i also have a son that will be 3 in sep. i have been working with him but not like i probally should, i have tried those training pull ups, i think they don't work when they are first starting out, but what i have been doing is when he first gets up i put him right on the potty, but i use the big one, and he almost always goes, but i also have special treats for him for only when he goes and he knows if he goes he gets one of those treats, so he tries so hard. but i am in the same boat as you.. i have heard putting cherrios in the tolid and tell them to aim, but my guy is a little bit younger then yours so u might be able to try that, but mine is still sitting. hope at least some of this helps-R.