Answer:
I have a head tail but no arms and legs.
I build bridges of silver and crowns of gold. What am I?
What seven letter word has hundreds of letters in it?
By myself, I'm practically nothing. Worthless as a leader, but when I follow a group, their strength increases tenfold. What am I?
The more holes you cover the lower I go.
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.