Okay kiddo, remember how we have a leader for the whole Catholic church called the Pope? Well, one Pope named John Paul II had a special job of picking some of the smartest and most helpful people in the church to be called Cardinals. These Cardinals help the Pope with important decisions and also help pick the next Pope if the current one can't do the job anymore. It's like having a special team of helpers for the boss. And even though Cardinal is a really cool name, they are still just normal people like you and me.