What do you think of me telling my 4 year old son that Santa doesn't actually exist.
What do you hope to achieve by telling him this?
He was always a messy boy and I thought believing that Santa might stop by his room sometimes would help. Now he lives in a fantasy world.
Four years old is a little young to tell a child that Santa doesn't exist. That will ruin the magic of Christmas for them. Try using a chore chart instead to encourage him to clean up behind himself.
I don't have time for this, I have to go and break the news to him.
Telling your 4-year-old that Santa is not real will only crush his spirit. You should use better parenting tactics to have your child clean up. Doing chores is something that your child will learn in time.