Answer:
Who is it that rows quickly with four oars, but never comes out from under his own roof?
A house of wood in a hidden place. Built without nails or glue. High above the earthen ground It holds pale gems of blue.
What can stand in place of a country but still fold away in a drawer?
With pointed fangs it sits in wait. With piercing force it doles out fate, over bloodless victims proclaiming its might. Eternally joining in a single bite.
I open wide and tight I shut, Sharp am I and paper-cut fingers too, so do take care, I'm good and bad, so best beware.
A first job for many kids, this could be described as "Media Distribution Management.