Okay kiddo, so a surname is like a second name that helps people tell who you are. Lita is a particular surname that some families have. Think of it like a special label that people in those families get to have just for being part of that family. It's kind of like different kinds of animals in the wild, they all have their own names so that people can tell them apart. In the same way, people have last names so that we can tell them apart too!