Boosters Through Age 8
Children who have outgrown child safety seats should be properly restrained in booster seats until they are at least 8 years old and they are 4'9" tall.
Unfortunately, this is the step most parents miss.
2017 National Survey of the Use of Booster Seats
Car Seats and Booster Seats | NHTSA
Boosters are For Big Kids
Boosters Seats Until the Seat Belt Fits
The Safest Place for Children
Studies continue to show that children under 13 are less likely to die if they are seated in the rear seat. A 2009 study showed the recent shift of children to the back seat of vehicles has resulted in significant fatality reductions.
Keeping Children Safe in Crashes
Remember, all children under 13 should ride in the rear sear. It's still the safest place for children.