Answer:
What is it that you ought to keep after you have given it to someone else?
Old people and owls are said to be this.
Big as a saucepan, deep as a cup, Even a river can't fill it up. What is it
Inside a burning house, this thing is best to make. And best to make it quickly, before the fire's too much to take.
A tangly game and a destructive weather phenomenon.
What is always coming but never arrives?