What we did was split it over two days. The first evening we went to City Center at about 6:00 and went to Chihuly and purchased our Seattle City Pass there. (they also have other combinations available). We then went through Chihuly and went over to the space needle where we were able to get an 8:30 elevator to the top. We timed it so that we would be up on the observation deck at sunset (which was 8:50 that evening). It allowed us to get pictures in daylight, at twilight and after dark. The second day we came back when MoPop opened at 10:00 a.m. (use the South entrance...less crowds). We were there until 12:15 and then took the monorail over to Westgate Plaza and walked the four blocks to Pike's Market and had lunch. After lunch, we went through Pike's Market and down to the waterfront. Since our City Pass tickets included the Aquarium, we visited that and then walked down to the Argosy boat dock and got on a 4:30 cruise tour (also part of the City Pass). After the cruise, we went back up to Pike's Market and had dessert, walked back to Westgate and road the monorail back to Seattle Center. We were then able to walk around the souvenir shops and other stands around the space needle. If you go to the space needle first, you can purchase the City Pass and reserve a time to go up in the needle (even for later in the day). I would strongly urge doing MoPop first thing in the morning because it was getting really crowded by noon.