JAY — The day after Christmas, 2-year-old Brianna Florer was laughing and jumping around with her older brother and two sisters opening presents at her grandparents' home.

The next day the precocious blond-haired toddler was dead.

An X-ray of her tiny body showed the "killer" was a shiny, silver button battery.

“On Saturday she was fine,” maternal grandfather Kent Vice said. “It was a perfect Christmas.”