When I was a kid, I used to spend a lot of time building things – whether soapbox racers, spaceship models or automatic window raisers. I used to do this because it was fun, was cool, and I felt that it was necessary to save the world from destruction by evil alien species. 
Over the years, I lost interest for these kiddy thingies, but one thing surfaced over and over again – my desire to build a functional robot arm.