The shop is just like every other museum shop. You'll find the
obligatory NASA stuff, Boeing (why am I not surprised), the coffee
table books, etc. No flea market stuff at all.

The cafe is a bit overpriced but not bad.

It's a neat little museum. In particularly the Red Barn - which is
the memorabilia from the early days of Boeing. And the Concorde, which
is surprisingly small and cramped.

We flew in as an Angel Flight - on an Airbus 320 and pulled up into
the parking lot (turn off from the runway). We parked the Airbus
pointing into the big windows less than 100 feet from the building.
Definitely "Airplane!" memory!

Have fun!