My brothers have grand-children. My neighbors have grand-dogs. We are special, since we have grand-autos.
Our son doesn't have kids or pets yet, but he has automobiles.
They say that the apple does not fall too far from the tree. My father-in-law was first a mechanic and repaired cars and then later in life sold autos. My hub once collected vintage cars, was an active member of a Mercedes vintage car club, and still likes to watch Formula 1 races. So that our son collects exclusive vehicles, sometimes tries his hand at repairing them, and watches Formula 1 races is not extraordinary.
Where does he keep the grand-autos?
At his home.
Where else do you keep grand-things?