My son (who turns 4 in November) has been dry during the day since last summer, but never showed any inclination to ditch his nappy during the night. About a fortnight ago he woke up dry and we took him straight to the toilet. We then had four dry nights so we stopped putting a nappy on him. After another week of being dry he has weed in his bed as soon as he has woken up the last three mornings. Do I persevere or put him back in nappies / pull-ups?