Hi J.,
I was wondering when kids should start wiping themselves, too, and a Supernanny show said about three or four years old. I have a four and a half year old and an eight month old. My older son just finished potty training a few weeks ago (it took forever, but he decided when he was ready!) but he is wiping himself. First I showed him how to wipe himself. I give him one or two flushable wipes and then I do the last wipe myself to see how clean he is (he usually does a good job!). He likes to see how much is on the wipe before he puts it in the toilet (yuck!). So maybe you can see if your son will wipe himself once or twice and then you can wipe him after that.
Just so you know...the Kandoo wipes are thinner than the Huggies wipes, and the Huggies dispenser is easier to use and doesn't dry out as eaily as the Kandoo wipes' dispenser. I just use the Huggies dispenser and buy whatever wipes are on sale.
At first I insisted that I wipe my son's bottom, but he was willing to do it. Then I realized that he goes to daycare, and I want him to know how to wipe his own bottom when I'm not there. So far, he has been doing a good job, but I will probably do the last wipe for a while whenever I'm with him. Good luck with your little one! :)
P.S. I just spoke to my son's daycare teacher (she works with the 2 and 3 year olds and potty trains them) and she says the kids pretty much wipe themselves starting at three. So they all seem to be wiping their own bottoms at school at three and four. She says they do fine (she checks them, too). Good luck again. :)