If it is proven that 16 year olds in general can grasp what the political world is about, and more importantly, care about it, then yes they should be allowed to vote. But children of that age have more important things to focus on such as school. When you do reach college/ university, you naturally are brought into a more "grown up" environment, not only through lecturers but other students which encourages you to be politically aware of what is going on. Not only in your own country, but the world in general. In high school, that doesn't happen to the same magnitude as it does later.