I have seen a TED talk on this before, but this one is even better. I like how Pranav explains his thinking and goals as he invented different devices.The applications that he demonstrates are so cool. The most incredible thing at the end is that he intends to make the software open source for the masses. I am going to show this to students to "wow" them and to challenge them to be innovative thinkers. It would also be a great for a writing topic about the future of technology.