I didn't realize they weren't "open" before! This place is super cool. We showed up late for the Difference Engine demonstration, but the volunteer re-ran it j

I didn't realize they weren't "open" before! This place is super cool. We showed up late for the Difference Engine demonstration, but the volunteer re-ran it just for us. The collection in impressive, lots of cool stuff to look at ("We went to the moon with _that_??").