Generally, children up to age three need a rear-facing car seat. Children between three and seven years old will typically use a forward-facing seat, and children between seven and twelve should use a belt-positioning booster car seat. Older children who are too big for car seats may be good with a simple backless booster. However, the right seat depends on the age and height of your child. Check the recommended height and weight limits of any car seat to ensure it’s safe for your child.