Okay kiddo, so the spirit world is a place that some people believe exists where spirits, which are like ghosts or souls, live after they die. Spiritualism is a belief system where people think they can talk to these spirits or even receive messages from them.
Imagine you have a friend who has a really cool toy, but one day they move away and they can't bring their toy with them. But you really miss your friend and you wish you could still play with them and their toy. Some people think that when we die, our souls go to the spirit world where they can still "play" or "live" there.
However, spiritualists believe that we can actually communicate with the spirits in this other world. They might hold seances, which are kind of like meetings or parties where they try to make contact with the spirits. They might also use tools like Ouija boards, which are boards with letters and numbers on them that spirits are believed to be able to use to spell out messages.
Some people think the spirit world is a really magical and mysterious place, where people can connect with loved ones who have passed away, find guidance for their lives, or even receive messages that can help them predict the future. But it's important to remember that this is just one belief, and not everyone thinks the spirit world exists or that we can communicate with spirits.