Answer:
A person's greatest asset.
A father's child, a mother's child, yet no one's son
Power enough to smash ships and crush roofs. Yet it still must fear the sun.
Bobby likes Jimmy but not Joe, apples but not pears, jeeps but not vans, shinny but not hockey, tennis but not squash. Who will he like, Sara or Sally?
The more you take, the more you leave behind. What are they?
What is lighter than what it is made of?