2003 Buick Century Owner's Manual - Page 40

Every time infants and young children ride in vehicles, they should have the protection provided by appropriate restraints. Young children should not use the vehicle's adult safety belts alone, unless there is no other choice. Instead, they need to use a child restraint. People should never hold a baby in their arms while riding in a vehicle. A baby doesn't weigh much until a crash. During a crash a baby will become so heavy it is not possible to hold it. For example, in a crash at only 25 mph (40 km/h), a 12-lb. (5.5 kg) baby will suddenly become a240-lb. (110 kg) force on a person's arms. A baby should be secured in an appropriate restraint. -- 1-33