The Spirit of the 12s Boeing 747-8F has been pretty popular, especially by tracing a 12 using their flight path. Tomorrow, Saturday the 1st from 11am to 1pm, it will be on the ground next to the The Future of Flight Aviation Center & Boeing Tour where you take photos and cheer on the Seahawks.
There will be a special Seahawks rally that starts at noon (arriving by 11:30am is suggested) and then fans will be able to file past the specially-painted 747-8F and take photos. Admission to the rally and taking photos are free. If you like the Seahawks and you like airplanes, this might be your thing.