I sit above what you use to see, Yet I’m not part of vision. I reveal your tension before you speak, And I mark your years without asking. You touch me when you think, Though I do no thinking myself. What am I?

Put me in your mouth, but don't eat me. I can start and end your day just right. Clean and fresh from my bristled head.

Throw me and I'll go, Coming right back to you.

girl Scouts, Boy Scouts, cops and agents all have this one item in common. What am I?

A ring of water, guarding the castle, Protecting the throne, be it lord or vassal. A liquid hug around old towers, Keeping enemies at bay for hours.