What small real life object can be used to represent a point, in Geometry? Such as a point on a line?

I was thinking a bb, like for a bb gun. But should it be three dimensional or flat, like a dime? For a project I need to have a picture of real life objects that represent some Geometry terms.What small real life object can be used to represent a point, in Geometry? Such as a point on a line?
Well, if you are going for accuracy, then there is no real-world object that would work. A point is something that can only exist in a mathematical context. Since a point, by definition, is zero dimensional, it has no width, height, or length. There are no zero dimensional objects in the physical world, so nothing you use is going to accurately represent a point.





However, if that degree of accuracy isn't all that important, and you just need a small object, a BB will probably work fine.