Originally posted by: John P.
Sorry I didn't see this until now, how long are you in town?
For the weekend you should have headed down to Alki Beach in West Seattle and had some fish and chips at Sun Fish, great stuff. Plus, it's warm for here this weekend so there should be plenty of "people" at the beach. You can still head down there during the week for some food, I'm not sure if Sun Fish is open on Mondays though.
Hit an M's game - should be plenty of seats available especially for the Royals games

The teams stink but the stadium is pretty cool. Wednesdays game is at 1:35pm if you wanted to hit an afternoon game. There is some good food to be had for decent prices around the stadium, hot dog stands and stuff. The food inside is great but expensive.
Enchanted Village and Wild Waves in Tukwila is OK. You won't be impressed if you've been to a bigger amusement park, but it's better than a sharp stick in the eye.
Definitely hit the Museum of Flight. Check to see if they are having any special workshops before you go. Looks like they had a Blue Angels souveneir workshop today, check their calendar here
Museum of Flight Calendar
What other kind of stuff are you interested in?