Chihuly museum under the space needle
Underground tour in pioneer square
Ferry to an island to do cute tourist stuff (Bainbridge or wherever)
Walk around queen anne and admire the architecture
Eat at one of the heritage seafood places on the shore (ray's boathouse or wherever)
Eat non-traditional seattle food (iirc i had great ceviche in capitol hill, berliner döner kebab after the underground tour, creole brunch at Toulouse Petit, etc)
Prepare yourself for the dorkiest fashion city OAT. You may find yourself thinking maybe i should buy a $400 arcteryx beanie in lime green??
Stay somewhere downtown and don't rent a car. walk around and get coffee at minimum 2 different places per day. The coffee shops are endless and generally amazing. Seattle has earned its coffee rep (imo)
Say hello to Trim and trimdog