Answer:
My voice is tender, my waist is slender and I'm often invited to play. Yet wherever I go, I must take my bow or else I have nothing to say. What am I?
What is the word that even in plain sight remains hidden?
What has one head one foot and four legs?
Until I am measured, I am not known. Yet, how you miss me when I have flown. What Am I?
Tear me off and scratch my head what once red is now black.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.