Nevada law specifically mandates that children who are under the age of 6 and weigh less than 60 pounds must be secured in an approved child restraint system. This requirement ensures the highest level of safety for young children, as standard seat belts are not designed to protect smaller bodies adequately. The child restraint systems distribute crash forces evenly and provide adequate support to the child's head, neck, and body, minimizing the potential for harm in case of an accident.