Your tiny baby has, somehow, grown into a big kid. The little squishy newborn who you were so careful to keep rear facing as she became a toddler and a preschooler, and for whom you researched combination seats, and then learned to convert her seat to a booster, and kept in a backless booster until she fit in the seat belt, finally passes the five step test. After wondering how that happened so fast, you might wonder if she can now safely ride with you in the front seat.
Both of these warnings are so ubiquitous that maybe you haven’t stopped to read them (or, maybe, your kids are so loud and busy that you haven’t had the chance). These federally mandated warnings say the same thing: the vehicle’s back seat is the safest place for children under age 13 to ride. Sometimes, this warning reads “12 and under”, but the recommendation remains the same: kids should ride in the back seat if at all possible before they turn 13.