It depends on the parents decision. But I wouldn't put a 10-12 year old child in a booster seat.If they're over 3'5 then they don't have to have a booster seat. What helps is to not have a booster seat and have just a cushion/ pillow underneath there bottom so that the seat belt doesn't hurt their stomach or hurt anything else.
In Georgia the minimum age is 6 years old, unless a medical waiver is obtained. The minimum height is 4'9" and weight 40 pounds which must also be met with age requirement.
7
it depends on their laws
The age in which a child can stop using a car seat or booster seat varies from state to state. In Michigan, the child safety seat law says that a child under the age of eight years old must be in a safety seat unless they are taller than 4' 9.
Do this to check if a child can leave a booster. The child should place their back on the seat with their big ass in the end. If the child's feet can touch the ground they are ready. Most children stop using booster seats when they are 7.
A child must be at least 25 kilograms or nine years of age before being able to leave the booster seat
It is not age but pounds for a child seat. Check with your DMV, but I think it is over 40lb.
in the UK it is based on height the boundary is 150cm or 4ft 11inch
In some places age does matter i think its around 7 8 years old but they also have to meet the weight an height requirements .
Foe a child to stop sitiing in a booster seat in Virginia usually has to weigh at least 80 lbs or reach 4 feet. but don't take my word to heart cause this is just what I heard.
I believe the recommended height is 4"3'
I'd say about 3-6 but they have to be a certain height and weight so it's different w/ every kid. Comment from Phatcharapimon : it depends on which types of booster seats; i.e. some may help safely transport "big kids" from 30-100 pounds, etc. (http://astore.amazon.com/healthy-care-booster-seat-20/detail/B004GEC8LU)
Keeping a child safe is an important and essential job. This can be a 24-hour job. Within this job, a parent needs to ensure a child is safe while in the car. This means that a parent can't think twice about his or her car seat choice and car seat rules. Although there is not an exact rule for an appropriate age at which a child should stop using a booster seat, most experts would agree that between the ages of eight and 12 would be most appropriate. The reason for this is that, a typical child in those age ranges would reach around four feet, nine inches, which would equate to an appropriate height to use a regular seat and seat belt.
you have to be age 4 to stop using a car seat. If the child is larger than average then you could probebly get away with a llittle bit younger.