I have a 4 yo that just started in my care in October (previous dc retired). First day he goes in to the bathroom - a few minutes later he calls out "K, I just pooped!" Um, okay? He then asked if I could wipe him....um no. I told him I do not wipe potty trained kids and he would need to do it. Mom had told me he was "fully" potty trained. IMO, that means they can wipe.