we own a kids-friendly booklet to explain it.
we now draw the pictures in it when we explain.
it works with the idea of the body as a house. and usually there is one person living in a house. but for us there are many. that is called DID.
the person standing in the door of the house is who you talk to. that person can change, depending who opens the door and steps outside.
and it is possible that others listen or watch thru the window as well.
sometimes the person at the door can call to someone who is inside the house and ask them stuff and then tell the people outside what they said.
and sometimes the one who stepped outside has been sleeping inside for a long time and they didn't see that the season changed and how much has changed.
sometimes there are struggles who can step outside. there is only room for one in the door.
like that. and drawing little houses with someone in the door or the window to help them imagine it better.
we find this a helpful metaphor for kids but also for adult friends. it doesn't explain everything but it offers just the help to understand what most people need when they first get in contact with DID.
i don't think that the booklet is available in english