DS1 - years (no I am not kidding) - started at 2.5yrs, I believe a combination of him having no idea what we were trying to do, and us being new parents and completely confusing him by chopping and changing strategies way too often.
DS2 - about 3 weeks - he started training himself, around 2yrs
DS3 - about 6 weeks - started at 3 years 7 months (no interest from him before this age)
DS4 - can stay in nappies forever if he wishes as I've learned it's not worth the grief if they're not ready
ETA: DS4 can say "wee wee", and I sit him on the toilet every night before his bath, sometimes he does something, other times he doesn't, it's all very casual and stress free, but probably a good precursor to get him used to the toilet, and an opportunity to teach him what "wee" is.
This post has been edited by mumandboys: 11/03/2012, 01:57 PM