Answer:
I am lighter than air, but a hundred people cannot lift me. Careful, I am fragile. What am I?
I twist and turn and leave a loop. What am I?
What is black when you buy it, red when you use it, and gray when you throw it away?
Take away my first letter take away my second letter take away all my letters and I would remain the same.
I start with T end with T and within me is T.
It flows out of the soil, It burns you if it boils, And holds us in its coils, More valuable than gold, As black as it is old.