A recorder is like a grown-up who listens to people who have a problem and helps them figure out what to do. Imagine you and your friends are trying to play a game, but you can't agree on the rules. You might go to a grown-up who can listen to everyone's ideas and help you all decide on the best way to play.
A judge is a very special kind of recorder who listens to people who have a very big problem. This problem is usually about someone breaking a rule or a law. The judge listens to both sides and decides what the right thing is to do. Just like a grown-up helping you and your friends play a game, the judge helps everyone understand what the rules are and what will happen if they are broken. The judge also makes sure that everyone is treated fairly and that nobody is punished too much or too little. It's a very important job!