We are in day 3 of toilet training our 18 mo old son. We started incorporating the "potty bell" today (day 3). Just a couple logistic questions. What should the bell timer be set to (at the minimum). If he has an accident before the timer goes off, should we re-set the timer or let it go off (even if its only a few min later) and have him sit on the potty again. He doesn't go over to the potty when the bell goes off on his own, should I take him to it/sit him on the potty?