Apostolic tradition is like following in the footsteps of grown-ups. When you see grown-ups doing something a certain way, you learn from them and do it the same way too. It's the same with apostolic tradition. When the first apostles taught people about Jesus and how to follow him, they showed them how to pray, how to celebrate important events like Easter, and how to live a good life. People learned from the apostles and then passed on these teachings to others who came after them. So apostolic tradition means that the way we worship and live our lives today is based on the teachings of those first apostles, and we continue to follow those teachings as they were passed down to us.