A Dungeons and Dragons exhibit, that is neat. Was or is Dungeons and Dragons popular in Finland?
The Commodore 64 exhibit would have been powerfully nostalgic - when I was a kid I would spend hours typing in games from a magazine - it was heartbreaking if the power flickered. My first storage device for it was a cassette player, and then I saved up and purchased a disk drive. Formatting a disk for storage sounded like a power tool going off!
It sounds likes your family is going to get a lot of use out of the museum cards.