Have been trying to potty train for several months unsuccessfully. Tried reward charts, sweets etc but he is still not telling me when he needs to go and doesn't want to break off from playing. Can manage to get him to wee several times a day by taking him to potty but can't seem to progress this. Am really fed up now!!!!His identical twin brother has been potty trained for months. Am running out of ideas and embarrassed to have the only child at nursery still in pull-ups at this age. Any ideas?