One museum that I find really fun is the Museum of Flight in Seattle. In the main atrium (which is incredibly large), you are surrounded by dozens of different planes which are both hanging above you and on the ground. It is a lot to take in at once and it is easy to become in awe of how many different kinds of aircraft there are and how they have changed over time. There are many other exhibition spaces within the museum, which includes Boeing’s first workshop (the museum is located on Boeing field), and a large outdoor hangar space for people to see the larger planes.
Another museum that I grew up going to is MoPOP. Not only is the exterior architecture very impactful (classic Frank Gehry) and a landmark alongside the Space Needle, but the exhibits are highly interactive. For much of my life it was called the EMP (Experience Music Project), which speaks to the interactive nature of the museum. For example, one of the permanent exhibits is the Sound Lab, where there are instruments and jam session rooms for people to play with. Also, there is a fairly new exhibit on video games where you can play samples of video games. Another popular permanent exhibit is on horror films, which is located in a dark basement level, which really immerses you into the experience of horror.