Answer:
What can be cracked before it's used?
I come without being fetched at night hides away as soon as daylight strikes. Although I may look small I am much mightier than what you can imagine.
It's been around for millions of years but is never more than a month old. What is it?
Born of sorrow, grow with age, you need a lot of me to be a sage. What am I?
No matter how hard you hit me, no matter how much I hurt, I'll always go for a laugh. What am I?
In birth I spring forth, in life I unfold. In death I wilt and die, but rebirth restores all.