Answer:
What do you get when you cross a cow with a trampoline?
I can be long or short. I can be grown or bought. I can be painted or left bare. My tip can be round or square. (one word)
What building has the most stories?
My rings are not worth much, but they do tell my age. What am I?
My days are numbered.
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.