Fun Riddles

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: In a town their is a barber who cuts everybody in the town's hair. But nobody in the town cuts their own hair. Yet the barbers always has beautifully kept and full hair.

Who cuts the barber's hair?

Question: What do you have that I use more than you do?

Question: A man is at work when he turns off the light and falls asleep. When he wakes up he discovers that lots of people have died.

What is his profession?

Question: There was a man who was born before his father, killed his mother, and married his sister. Yet there was nothing wrong with what he had done.

Why?