Answer:
What can you share and still have all for yourself?
Iron roof, glass walls, burns and burns and never falls.
What is the only letter in the alphabet that does not appear anywhere on the periodic table of elements?
What does man love more than life, fear more than death or mortal strife. What the poor have, the rich require, and what contented men desire. What the miser spends, and the spendthrift saves. And all men carry to their graves.
I'm not really more than holes tied to more holes. I'm strong as good steel, though not as stiff as a pole.
People take me on walks and I run and have fun. What am I?