Jack is not old, but he does not have much hair. His wife Helen has thick and black hair.
They have a son. His name is Peter, and he is five years old.
One day, Jack is reading a book in his room. Pe-ter looks at his
father for a long time and says to his mother,"Why does father have so little hair,Mom?"
"He has little hair because he thinks a lot. He is a very clever
man." Helen says with a smile.