A nursery school teacher was delivering a station wagon full of kids home one day when a fire truck zoomed past.
Sitting in the front seat of the fire truck was a dalmatian dog. The children started to discuss the dog’s duties.

“They use him to keep crowds back,” said one youngster. “No,” said another, “he is just for good luck.”
Then a third child brought the argument to a close…”They use the dog,” she said firmly,
“to find the fire hydrant.”