hmmm, really?

A kindergarten class had a homework assignment to find out about
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 walked up
to the front of the class made a small white dot on the blackboard and
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, Daddy had a heart attack, Mommy fainted, and
the man next door shot himself."