Booster Seat Age

booster seat
An extra seat or cushion placed on an existing seat for a small child to sit on
An infant safety seat, also known as a child safety seat, a child restraint system, a restraint car seat, or ambiguously just as a car seat, is a restraint which is secured to the seat of an automobile equipped with safety harnesses to hold an infant or small stature people in the event of a crash.
(Booster Seats) Are intended to be used as a transition to lap and shoulder belts by older children who have outgrown convertible seats (over 40 pounds). They are available in high backs, for use in vehicles with low seat backs or no head restraints, and no-back; booster bases only.
(Booster Seats) Booster seats are not permitted in any Spaceships vehicle.

age
historic period: an era of history having some distinctive feature; "we live in a litigious age"
A particular stage in someone's life
begin to seem older; get older; "The death of his wife caused him to age fast"
how long something has existed; "it was replaced because of its age"
The length of time that a person has lived or a thing has existed
The latter part of life or existence; old age