Riddle: The more it is made, the more it is destroyed. The case can't be cracked, yet you won't be able to avoid. It can be used for play, or just a simple stay. Small, medium, or large, used in both light and in dark. What is it?
Riddle: I shake, but unlike the strength of an earthquake. You can find me both high and low, usually out of control. I can be considered both good or bad, sometimes used for both happy or sad. What am I?