Okay they look like some kind of marker. I have seen tennis balls on string used as parking marker, but thats hanging from the ceiling/roof and once you hit the ball you know to stop. So unless those things hook into something upside down or on their side, I have no idea.
my best guess is basically teeball tees. used for hitting practise in baseball. put the ball on top and its connected so that it wont go far at all. some people use stuff like that to practice how the swing the bat.
at least that what it seems to be. pretty cheap ones though if thats what it is.
That is pretty interesting, though.
at least that what it seems to be. pretty cheap ones though if thats what it is.