Atkinson is an English-language surname. The name is derived from a patronymic form of the Middle English Atkin.
Once children outgrow their booster seat (usually at 10 â 12 years old) they can use the adult lap/shoulder safety belt if it fits them properly. Lap portion low over the hips/tops of thighs and shoulder belt crosses the center of the shoulder and center of the chest.
That's why the National Highway Traffic Safety Administration now recommends that all children who have outgrown their car seat continue to ride in a booster seat until: 1  They're at least 8 years old AND 4 feet 9 inches tall. 2  They have outgrown the manufacturer's height and weight recommendations for their booster seat.