Here's home movie footage of New York City's Central Park Be-In during Easter of 1967. 

A young woman with glasses and pigtails shakes a noisemaker, while hippies in a circle make music. CUs of instruments, including bongos and steel cans. A couple wearing vertically-striped hooded bathrobes walk past the camera, which pans up to a man in tree. A blonde woman reads aloud from a book. A brunette woman considers a feather. A crowd of people up on a rock, one of whom is blowing a vuvuzela-like horn. A woman with antenna-like headgear wanders past the camera. A man plays bongos. CUS of men wearing round granny glasses. Uniformed police walking through the crowd.