Okay kiddo, so imagine you are playing with your legos and you build a really cool castle. But then you realize that one of the walls is a little bit crooked and doesn't quite fit right. So you decide to take apart that wall and rebuild it so that it fits perfectly with the rest of the castle.
Well, a revising barrister is kind of like someone who does that same thing, but with words instead of legos. They read over important documents like contracts or legal arguments and make sure that everything is written in the best way possible.
Just like how you wanted your castle to look perfect, these barristers want the words in these documents to look perfect and make sense. They might suggest changes to the wording or the order of things to make it easier to understand or to make sure that it follows the rules of the court.
So just like how you like playing with legos and making things look good, these barristers like playing with words and making things look good too!