The first duty towards children is to make them happy. If you have not made them so, you have wronged them. No other good they may get can make up for that.
Bio: Tulku Urgyen Rinpoche . A contemporary Buddhist master of the Kagyü and Nyingma lineages, who lived at Nagi Gompa hermitage in Nepal, Urgyen Rinpoche was considered one of the greatest Dzogchen masters of our time.