I just bought an Uno Makershed kit last weekend. I am still somewhere just past hello world in my understanding of the interface, to be sure, because my hardware experience is limited to having used LEGO-LOGO back in the 80s as a kid.

But then again this seems a lot easier to get my head around than I imagined it would. I might go so far as to call Arduino a LEGO-LOGO that grew up, moved out of its parent's house, and got a job.