You might want to read about on peer pressure and age influence here: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2779518/
Do you really want your children to be exposed to political influence at such a tender age when they are already dealing with peer pressure, bullying and all other negative aspects that come with school life?
Giving them voting rights at such a young age will just make them all into activists or worse politicians. I see so many child activists who are just being exploited by their parents for making a quick buck. Most of what these children utter on TV is just stuff that have been told by their parents. If you talk to them outside of all this media circus you'll know that they are innocent and don't have much idea about the World except for doing what they are told.
This is what happens when you engage children in politics/activism: https://www.youtube.com/watch?v=ZVUhKpnv8-k
They are just not prepared for it. The moment you go off script the cookie crumbles. But keep aside politics/activism for a moment. Do you think it is fair that a child has to go through this sort of exploitation for what should be adults coming out with solutions? Because let us face it. This is exploitation. The child needs to be in school studying and enjoying with friends. She will never get back this youthful life again. We as adults are literally using children as props to settle our political issues. This is immoral and not right.
If the age of voting is lowered to 6 (as some have asked for: [1]) or even removed altogether what stops me from producing 5-10 kids and then having them vote for a political party that I support? That is 5-10 extra votes in just a decade. And if 1000 families do that, that would significantly tilt the outcome of an election. By the time they grow up to understand what their rights are and that they were being exploited by an adult they would feel disgusted that they were used (or rather misused). You are assuming that minors have inherent understanding of political issues at that young age. Most don't. And it is not reasonable to expect them to know.
Voting should only be enabled for those who are completely aware of their rights. Children typically are not. They are not political by nature. They are playful and more interested in learning things around them. Turning them into political ballots waiting to be exploited by adults around them is the last thing we need in this already fractured World.
[1]: https://reason.com/2018/12/07/should-we-let-children-vote-th...