Kyuubi4269 posted...The point is you don't teach people how to do stuff only when it's already become necessary.
You also don't teach them how to do stuff when it's likely to be dangerous due to their age and there's no need to do it now. At 9, she's got at least 7 years before she'll be needing to gas up her own vehicle. Presuming a fillup every two weeks, that's another 182 opportunities to get her to do it.
It's also not like pumping gas is likely to be urgently necessary when that time comes. Once she starts driving, it's likely that she'll have a parent with her while she practices, and gassing up can easily be incorporated into that practice. She shouldn't go off on a long-distance road trip solo without learning how to gas up, certainly, but that's very obviously a bad idea and there's no reason to jump to that possibility.