Do You Hear The Music in Your Head?

Bright and early (7:15 a.m.) Saturday morning:

Ryan: Holding his head..."Ugh. My head won't stop it."
Me: What's wrong? What is your head doing?
Ryan: It won't stop playing music with my teeth!

HAHAH!!  Ryan has been grinding his teeth a lot lately and he thinks that the grinding is "music"!  He also thinks that his head controls it and he can't stop doing it!  I'm looking into what type of mouth guards he can wear during the night, if any at this age, to protect his teeth.