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.
It varies in different states. In California the child must be 6 years old or weigh more than 60 lbs to ride in the back seat without using a bolster or booster seat. For cars that have lap only seat belts (no shoulder straps) in the back seat, the child can stop using the car seat at 40lbs.