A kindergarten class had a homework assignment to find out about something exciting and relate it to the class the next day. The first little boy called upon, walked up to the front of the class, and with a piece of chalk, made a small white dot on the blackboard, then sat back down.  Puzzled, the  teacher asked him just what it was.

"It's a period," said the little boy.

"Well, I can see that," she said, "but what is so exciting about a period?"

"Damned  if  I know," said the little boy, "but this morning my sister was missing one,  Dad had a heart attack, Mom fainted, and the man next door shot himself."