Answer:
I am free for the taking. Through all of your life, though given but once at birth. I am less than nothing in weight, but will fell the strongest of you if held.
I build up castles. I tear down mountains. I make some men blind. I help others to see.
What word is the same written forward, backward and upside down?
A house with two occupants, sometimes one, rarely three. Break the walls, eat the boarders, then throw away me.
Big as a biscuit, deep as a cup, but even a river canβt fill it up. What is it?
I am owned by Old McDonald.