Forsaking picnics and hotdog contests, two staples of New York City July 4 celebrations, area peace grandmothers held the Third Annual Reading of the Constitution, the Bill of Rights and the Declaration of Independence in Strawberry Fields. Believed to be the only celebration of its kind in the country, the readings took place on a gorgeous day in Yoko Ono's Central Park oasis dedicated to the memory of her husband, John Lennon.