Dear Young Master Harrison,
Good evening sir. It has come to my attention that perhaps you have teeth about to come in. I have had many hours to ponder this situation while you deny me slumber. I might go so far as to say that I have only slept a handful of 40 minute increments the past fortnight. Consider this note a friendly warning that I may run away until your 5th birthday or so if this shit keeps up.
Lovingly,
Mother