Answer:
A precious gift, yet it has no end, no beginning, and nothing in the middle.
Come up and we go, Go down and we stay.
Once you know it exists, it no longer exists. What is it?
What can be seen but not touched?
You can break it or drink water from it.
When is it bad luck to see a black cat?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?