Okay kiddo, I'm going to tell you about an important word in the law called "element". In criminal law, an element is a specific thing that someone has to do or not do in order to be found guilty of a crime. It's kind of like a recipe for a cake, where you need certain ingredients to make it taste good.
Let's say someone is accused of stealing something. There are certain things that the prosecutor (the person trying to prove the accused is guilty) has to show in order to get a conviction (a guilty verdict). These are called elements of the crime. One element might be that the accused took something that didn't belong to them. Another element might be that they did it on purpose, not by accident.
If the prosecutor can prove all the elements of the crime, then the accused can be found guilty. But if they can't prove all the elements, then the accused might be found not guilty.
So, to sum it up, an element in criminal law is a specific thing that someone has to do or not do in order to be found guilty of a crime. It's like a recipe that the prosecutor has to follow to prove that the accused did something wrong.