That is just a very stupid idea. The best thing for all of us everywhere is for the most rational and well-informed people to vote. The fact that everyone gets a vote is unfortunate for all of us because that includes voters who vote against the public interest, but it is necessary for a free democracy.
Seems like you are arguing for meritocracy here, which has it's own set of problems.
Even if you want to make the argument that some are informed enough, they are far, FAR fewer than in the adult populace. You do not want to broaden that window.
Honestly, this sounds exactly like an argument that could have been made in a debate about whether or not black people or woman should be allowed to vote.
I think you said it yourself, democray needs to endure that sometimes people just don't vote in the same way or for the same reasons as it suits ones own views.
No, i might have been a bit unclear with my wording, but the pensioners got their huge gifts. They are the largest group of the electorate (and growing) , so there are plenty of incentives to please them, unlike children, who have no vote.
I was more thinking about a blanked ban on school grounds, not just during lessons. In any case i am not necessarily against it, but i think this brings us off topic too much. My main point was mostly just that particularly in regards to technology there might be a large gap and the younger generations would bring some perspectives that might not be properly represented.