Types of Forward-Facing Car Seats. Convertible car seat. This type of seat can be used in a rear-facing position first, and then turned to face forward when your child is big enough after age 2. If you have one of these seats, you do not need to buy a new car seat until your child is ready for a belt positioning booster seat. Forward-facing-only car seat. This type seat is used in only one direction and has a 5-point harness and top tether.