Okay kiddo, so the Eagle of Saint John is a symbol that represents a special person named Saint John who is important in Christianity.
You know how sometimes we see birds flying in the sky? Well, an eagle is a special bird that is really strong and can soar very high. That's why it's used as a symbol of Saint John because he was a very important person in the church and was a strong leader who helped spread the word of God.
So, when we see an image of an eagle with Saint John, it reminds us of his important teachings and leadership, just like when we see a bird flying in the sky, we remember how powerful and free they are.
Does that make sense, kiddo?