Okay kiddo, so you know how there are different kinds of churches and people go to different ones to worship? Well, in England there is a big church called the Church of England and it has different groups of people who share a common belief.
One of these groups is called the catholic society, and they believe in a lot of things that are similar to the Catholic Church. They believe in things like the importance of the saints, the pope, and the Virgin Mary. This is different from some of the other groups within the Church of England who don't believe in these things.
The catholic society has their own meetings and worship services, and they try to follow the traditions of the old Catholic Church as much as they can. They might use symbols or wear special clothing to show their beliefs, and they might also have their own leaders who guide them.
But even though the catholic society is different from some of the other groups in the Church of England, they are still all part of the same big church. They just have different beliefs and ways of worshiping.