Proportional representation first. Then letting younger people (6?? maybe 15+) vote will have more impact.

People who say they’re voting “with their gut” lie about that, they’re voting to ensure specific outcomes for themselves or their community, but have no desire to explain any of that. Having six+ year olds vote would just include a population that votes with their gut, but doesn’t have any justification beyond peer or social pressure. While some adults vote based on peer or social pressure, the majority do not. The targeted political messaging at a young age will also create an even more polarized society, maybe with more propensity towards extremism because the longer you’re recruited to a cause the more likely you are to do something violent for it.