Quite recently, my son asked me a question “What is the Height of Mount Everest?”, My reply was simple enough “It is 8,848 meters above mean sea level”. It was but the follow-up question which really boggled me, “Who climbed the Mount Everest with GPS to measure the height?”. This for me was a realization of the peculiar nature of kids to know about the world around them. Some other FAQs fairly of a similar sort are: ·        How deep is the ocean? ·        Where do rocks come from? ·        When will humans live in space? ·        Why were the numbers made? Last week, at an Engineering University, we presented 3D printed models of some dams & hydropower projects under construction in Pakistan. These were appreciated by the visiting industry professionals, faculty members and especially engineering students. The students were highly inquisitive about the tool...