I'd go even that far that 7-9 yo kids in Vietnam, Laos or Thailand already ride motorbike (scooter) at that age, I crashed because of them once in Laos (on the way to Plain of jars), just suddenly stopped in front of me on dusty road, I stopped as well, but sadly I had passenger behind me who balanced in other direction, so we flipped to side when bike slipped a bit.