One day a little boy walked up to his mother and said Mommy I know why dogs have puppy's and why cat's have kittens, but why don't big trains have little trains? She told him that he would have to ask his father that question when he gets home from work.

Later that evening after his father got home from work, and they were sitting down having dinner the little boy said Daddy I know why dog's have puppies and cat's have kittens, but why don't big trains have little trains? His Daddy sat there for a moment and then said tomorrow is Saturday we will go down to the railroad yard and you can ask the conductor that question. the little boy said OK and went to bed.

The next day rolled around and the little boy is so excited to go to the railroad yard. The little boy and his father are off to the railroad yard. When they get there the little boy's Daddy says to him do you see the man standing down that way by the Train wearing the nice vest and hat. The little boy say's yes. Well that is the conductor of the train go down there and ask him your question.

The little boy goes to the conductor and says Mister conductor I know why dog's have puppies and why cat's have kitten's, but why don't big trains have little trains? The conductor looks down at the little boy and say's your father put you up to this question didn't he? The little boy said yes! The conductor looks at the little boy and said while looking at his watch you tell your father that it is, because the Norfolk and Southern always pulls out on time.