What Am I Riddles

Question: The more places I be, the less you can see.

What am I?

Question: When I'm born, I stay in the sun A little time, and I make crazy When I'm old, I'm worth a fortuneWhat am I?

Question: When you bend me I'm kind
But I'm very hard to find
I'm easily sold
and rhyme with this when told

What am I?

Question: I can be used to build castles,
but I crumble in your hands.
I can help a man see,
and am found all around the lands.

What am I?

Question: Travel a mile and I will change.
Travel a million and I will end as I started.

What am I?