An anecdotal story related to one by a grandparent, intended to impart wisdom to the younger generation.
Grandchild: "Grandma, what was it like growing up in the Great Depression?"
Grandmother: "I'll give you a piece of advice. If you're ever hungry and you don't have any money, you know what you do? Go into a restaurant, and ask for a cup of hot water and some ketchup. These things are free, right? Then, put the ketchup in the water and make yourself some tomato soup!"
Grandchild: "Thanks for the gramecdote!"