Answer:
If you drop me I'm sure to crack. But give me a smile and I'll always smile back.
A nut cracker up in a tree.
One by one we fall from heaven down into the depths of past, And our world is ever upturned so that yet some time we’ll last.
Take one out and scratch my head, I am now black but once was red.
It is able to speak because it has a hard gone. You know what it is as soon as it has sung. What is it?
What is so fragile that saying its name breaks it?