Secrets of Parents
Actually, most parents are smart enough to use grannies as the strategic co-warriors. They know their children are more frank with their parents than with them and they sometimes use grannies in order to find out more about their children. Grannies know everything and they are like mines of information of the whole information.
Though, children may be just as smart as their parents. All they need is to realize that their parents used to be young and they also made mistakes and those may be the same mistake they, children, do. And this is a great weapon against parents, a means that can help children to explain their parents a lot of things they can't realize.
Grannies are mothers of your parents and they know everything they did and they know what in common is between you and your parents. And they will tell you everything they need, they always glad to talk about past and about things their children did. Talk to your granny about your mother or about your father and life will become more interesting for you.
See, grannies are not just people who know the secrets of magic recipes, but they are also people who know about all those secrets of your parents. They know all of those secrets your parents have and they may be of great help for you.