I take you by night, by day take you back. 
None suffer to have me, but do from my lack. What am I?

What is so fragile the slightest sound will break it?

What is necessary to light a candle?

What room do ghosts avoid?

When does a traveler not need his map?

What did the wall say to the calendar ?

What is in front of a woman and at the back of a cow?

When you buy me am square.
When you open me am circle.
When you eat me am triangle.

I go up when rain comes down. 
What am I?

You can crack me, 
You can make me, 
You can tell me, 
You can play me. 
What am I?

What can be opened but cannot be closed?

A blind beggar had a brother who died. What relation was the blind beggar to the brother who died?
("Brother" is not the answer)