Answer:
How many bricks does it take to complete a building made of brick?
A precious gift, yet it has no end, no beginning, and nothing in the middle.
Seven brothers, five work all day, The other two, just play or pray.
If you are unsure how to use one then just ask a flight attendant.
I occur twice in eternity. And I'm always within sight.
When is it bad luck to see a black cat?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?