I think most parents of kids that are potty trained by 16 months are usually doing alot of elimination communication, reading cues, etc and have acted on those at very young ages to take advantage of the opportunity to get them in the habit of eliminating in the potty all the time.... This is a little different than the traditional style potty training where you generally wait till the child starts to show discomfort in being wet/messy, asks to try the potty, shows curiosity in you using the potty, etc.... If your child is doing these things now, then it's a great time to act on their interest and start! I would get some small easy to use potty chairs and keep them easily accessible. When home, they can stay naked around the house and then taken to the potty every hour to eliminate...as they start to get the pattern they will ask to go themselves. Always take them when they ask :-) even though it's often a pain, especially when out! Have a small reward system and I would recommend never ridiculing, punishing or getting angry with accidents. They are going to happen, probably for a while and it will only set you back to cause stress or anxiety. Get some cool undies for daytime...nite-time will liekly be diapers for a while. Two may be good, but it is young for a boy to be competely trained but starting is good :-) In my experience the key is taking them to the potty frequently whether say say they need to go or not and starting to look for signs of pee or poo... the more they go in the potty, the more of a habit it becomes and the less accidents :-) Good luck! :-)