According to the U.S. Centers for Disease Control and Prevention, children under 12 years of age should not ride in the front seat. As the CDC explains, air bags can hurt and kill young children.
According to the CDC, children under 2 years old should ride in the back seat in rear-facing car seats. Children from 2 to 5 years old can ride in front facing car seats but should remain in the back seat. Children over age 5 should use a booster seat in the back seat to ensure that the lap and shoulder belts fit properly. CDC statistics assert that car seats reduce car crash fatality rates by 71 percent for infants and 54 percent for toddlers.