Wow! They are so great! You can seldom see kids like that nowadays. They are truly a proud of the school and especially their parents. Congratulations for the parents for raising their children well. Understanding universe and the bodies of it needs a lot of understanding and patience. Imagine that you are imagining yourself being one of the sand grain. That's amazing. This kids should be given special assignments and studies because I can see that they are having a great future on their hands.