The factors you need to consider when choosing a car seat include the traffic laws in your state as well as the age and weight of your child. Infants will need a rear-facing seat that buckles securely into the car's existing belt system. At about nine months old, babies can have a more spacious seat that will keep them safe and allow them to enjoy the scenery.
A booster seat is appropriate for small children, giving them protection while also elevating them sufficiently to look outside.