Answer:
A locked sphere without hinges or key. Break me open and golden treasures you'll see
Don't forget to do this before blowing out the candles.
Words come out of it, aligned in perfect silence. A messenger of black on white, a slinky fellow drawing lines, of thin and soft graphite
Sugar on a stick. The kids love licking them
Small and bearded, both in the real world and in stories.
I've been argued on my color. Without me you'll die. So many attempts on your life use me so make sure you have many of my White friends.