Freudian Slip?

Would you believe, today I had another "duh" moment, or as our school book keeper pegged it, a Freudian slip! In the third grade class I began reviewing the musical staff and the letter names of the lines and spaces. First of all I had them explain to me what the musical staff is, that it is made up of five lines and four spaces, etc. Then I drew two of them, one with the treble clef sign and the other with the bass clef sign. I asked, "Now when we see two staffs like this together, what is it called?" A child raised his hand and answered correctly, "The grand staff." I proceeded to write "grand staff" above the two staffs I had drawn. As I finished writing and turned toward the class, a child exclaimed, "Grand STAUFFER???" I looked at what I had written, and sure enough, instead of "Grand Staff" I had written "Grand Stauffer!" Well, I just cracked up, and the children howled with delight. I said, "Well, I AM GrandMA Stauffer!"