Okay kiddo, let's talk about the ancient Egyptian idea of the soul. The Egyptians believed that every person had something called a "ka" and a "ba" inside of them.
The "ka" was like a life force, kind of like your energy. It's what made you who you were and what kept you alive.
The "ba" was like your personality, your unique qualities that made you different from everyone else.
But that's not all! The Egyptians also believed in something called "ka-mut-f", which was like a combination of your "ka" and your body. They believed that even after you died, your "ka-mut-f" would still exist and it needed a body to live in.
So they would do things like mummify bodies and build tombs for their dead, so that the "ka-mut-f" would have a place to stay. They even left food and drink in the tombs, because they believed that the "ka-mut-f" would get hungry and thirsty.
So there you have it, the ancient Egyptians believed that everyone had a "ka" and a "ba" inside of them, and after they died their "ka-mut-f" needed a body and a place to stay.