Okay kiddo, let's imagine that a long time ago, there were people who lived here in America that we might call the "ancient Americans". They built homes and made things out of rocks and clay. They also had their own language, stories, and religion.
Now, a man named Joseph Smith said that he found a book called the Book of Mormon that was written by ancient Americans. He said that an angel led him to the book and that he translated it into English.
However, some people have wondered if the stories in the Book of Mormon are really true because when archaeologists have dug up sites where these ancient Americans may have lived, they haven't found the same things mentioned in the book.
Archaeologists study the things that people have left behind and they haven't found evidence of big wars or cities like the book describes. They also haven't found any artifacts or buildings that match what the Book of Mormon describes.
So some people believe that the Book of Mormon is just a made-up story, while others believe that maybe the ancient Americans didn't leave behind much evidence or that we just haven't found it yet. We don't know for sure, but it's interesting to study and learn about either way!