Answer:
What eight letter word has "kst" in middle, in the beginning and at the end?
What’s full of holes but still holds water?
What has keys but no locks, Space but no room, You can enter but you can’t exit.
A tower at the root of all confusion.
This sparkling globe can float on water. It is light as a feather, but ten giants can't pick it up.
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.