Alright kiddo, have you heard of the Mahabharata? It's a very old story from India, kind of like a really long fairy tale. But some people say it's a real story too! That's what historicity means - whether something actually happened or not.
Now, the Mahabharata story is about two families who battle for a long time. One family is called the Pandavas and the other is called the Kauravas. They fight and fight until almost everyone in both families is killed. But the Pandavas win in the end.
Some people believe that this story is just a made-up story, like Cinderella or Snow White. But others say it's based on a real war that happened a really long time ago, more than 5000 years ago! The people who believe this say that the story has been passed down by word of mouth for thousands of years.
But here's the thing kiddo, there's not a lot of evidence to prove that the Mahabharata war actually happened. We don't have any letters or photographs from that time, because it was so long ago! So some people think it's just a fun story to tell, but others still believe it might be based on a real war.
So, while many people have different views and beliefs about the historicity of the Mahabharata, we cannot say for sure whether it is completely true or just a myth. Does that make sense, buddy?