Answer:
I am a ship that can be made to ride the greatest waves. I am not built by objects, but built by minds. What am I?
I have married many women but have never been married. What am I?
I build up castles. I tear down mountains. I make some men blind, but I help others to see. What am I?
Never ahead, ever behind, yet flying swiftly past, for a child, I last forever, for adults, I'm gone too fast.
I cannot be bought, cannot be sold, even if I'm sometimes made of gold. What am I?
Runs over fields and woods all day. Under the bed at night sits not alone, With long tongue hanging out, Resting at your feet until we go for a walk