What ages should a child where a car seat?
between the age of 8 and 9
What are the ages that children are required to be in an appropriately fitting child booster seat?
it is not the same for all cars it depends seldom on the type of car and model
What age should you place a child in a approved child seat?
it usually depends on the height and weight, but you place them in an approved seat at age 5.
Should a child use a booster seat in the middle of the back seat when only a lap belt if available?
If your talking about the booster seat without a back then NO, It is not safe for the child to ride with only a lap belt.
Should you start your child in weightlifting between ages 12 and 13?
There isn't any danger in doing it but at age 12 they should probably lift 5-10 and 13 should life 10-25 lbs and do what your kids want to