Answer:
Three lives have I. Gentle enough to soothe the skin. Light enough to caress the sky. Hard enough to crack rocks.
What word has kst in the middle, in the beginning, and at the end?
It is greater than God and more evil than the devil. The poor have it, the rich need it, and if you eat it you'll die.
I move without wings, Between silken string, I leave as you find, My substance behind.
What word is a plural, but when you add an "S" to the end, it becomes singular?
You use it between your head and your toes, the more it works the thinner it grows.
Difficult
Animal
Easy
Food
Funny
Kids
Logic
What am I?