Pacific Science Center
Another city pass activity, this also included a free Imax movie. The Pacific Science Center is a hands-on exploration of all things science. Even though the center is geared towards kids, it's also a lot of fun for adults. The best part of the science center is the butterfly pavilion; they're attracted to red and other bright colors so when I went in with my red shirt it was like a butterfly magnet! There's so much to do there outside--there's a water wheel, many places to take photos, and you get to play tic-tac-toe with a robot.
From journal Seven Days In Seattle