Answer:
Passed from father to son and shared between brothers, its importance is unquestioned though it is used more by others.
I cannot be felt, seen or touched; Yet I can be found in everybody; My existence is always in debate; Yet there is a style of music named after me.
A red house is made out of red bricks. A blue house is made out of blue bricks. What is a green house made out of?
What flies forever, rests never?
Tickle with your fingers and a song it will sing. Be careful, though, you may break a string. What is it?
What never gets any wetter no matter how hard it rains?
Easy
Animal
Difficult
Food
Funny
Kids
Logic
What am I?