I've lived in Seattle for just over two years now and have finally taken the Future of Flight tour*. It's $15 which seems kind of expensive for the tour you'll get, but it's also not something you visit as often as a Zoo or Aquarium. I came mostly to see the new 787 and rolling 777 line. The 787 line is up and churning out a bunch of aircraft, now waiting around for FAA approval. Very cool facility to see. 787 is a modern marvel and I especially like the changes to the human factors engineering aspect, such as reducing jet lag with lighting tricks. If you haven't seen the facility or haven't in a long time ago, I recommend checking it out when in the area. Easy to find, takes 90 minutes start to finish and free parking. I'll probably take the tour again in a few years assuming I wont have to fly to Charleston to do it--irony. *When I arrived in Seattle those carnies were striking amidst an economic downtown when many of us were losing jobs and struggling--honestly it disgusted me. Not to mention their strike forced layoffs to ripple through their vendors.