A kindergarten class had a homework assignment to find out something
>exciting and relate it to the class the next day.
>
>When the time came to present what they'd found, the first little boy
>the teacher called on walked up to the front of the class, and with a
>piece of chalk, made a small white dot on the blackboard and sat back
>down.
>
>Puzzled, the teacher asked him what it was. "It's a period," he replied.
>I can see that," said the teacher, "but what is so exciting about a
>period?"
>
>Darned if I know," he said, "but this morning my sister was missing one.
>Mommy fainted, daddy had a heart attack and the boy next door joined the
>army".