It happened just before 5 PM on Saturday, in the northbound lanes near Moccasin Wallow Road in Palmetto.
According to Florida Highway Patrol, a Ford Explorer hit the shoulder of the road, causing it to rollover a few times, hitting several trees.
Three adults and nine children were inside the car at the time of the crash. A two-year-old boy inside the car died and a six-month-old is in serious condition at All Children's Hospital. All three adults are also in serious condition ta Bayfront Medical Center.