And check out the Living Computer Museum if you're in Seattle (https://livingcomputers.org/). They have a ton of systems you can play with including a CDC 6500 and a DEC PDP-8e.
When I was a child, I visited the computer museum in Boston, and have very fond memories of it. I dearly wish it still existed in the same form today, I would appreciate it so much more.
If I'm not mistaken, the thiveing Computer History Museum in Mountain View, CA, is where everything from that museum moved to, so no(?) artifacts were lost. I can personally recommend it.