Okay kiddo, so a standard Borel space is like a special kind of box that has some very specific rules about how things can fit inside it.
You know how when we organize our toys, we sometimes put all the cars in one box and all the dolls in another box? Well, a standard Borel space is like that, but for much more complicated things than just toys.
It's a box that contains all sorts of different objects, but they have to be organized in a very particular way. For example, all of the objects have to be a certain shape and size, and they have to be able to fit together without any spaces in between them.
This box is used by scientists and mathematicians to study all sorts of things, like how different particles interact with each other or how shapes can be folded and twisted.
So basically, a standard Borel space is like a super specific and carefully organized box that helps smart people learn and discover amazing things!