Answer:
A precious fluid, thicker than water.
I can be cracked, I can be made. I can be told, I can be played.
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.
What 8 letter word can have a letter taken away and it still makes a word. Take another letter away and it still makes a word. Keep on doing that until you have one letter left. What is the word?
What can you catch but not throw?
When is it bad luck to see a black cat?