What to do When There Isn't Enough Characters

So, it is a great story but there are only 3 characters. Then the question is what to do.  Well, every script I have written has a narrator.  The narrator can have some long speeches in a story and the point of readers theater is to make sure everyone has something to say.  Why not have more than one narrator?  No one every said you could only have one narrator.  So, that's what I did with one of my scripts.  There were parts for 3 narrators and it worked fine.  In the script I just labeled them narrator 1, narrator 2, and narrator 3.  I thought the children might question this, but not one of them did.