1. at what age/point did your DC start pulling on & off their underpants and pants? figuring they are wearing sweatpant style pants

2. when did they start going to the bathroom themselves? For instance, if you have the stool & seat on the potty, when did they hop on themselves? We are not using a little seperate potty seat (and its working perfectly)

3. do you let your LO "attempt" to wipe #2 themselves and you finish up? DS actually wants to but is WAY off. And when did they "master" this

Thanks! P.S. I have a boy and he will be 3 in January if any of that matters