Cool stuff. You gotta enjoy 70s style pinball motifs and an owl in a hat where ever you can find them. My fave is the "Dungeon Master" raygun. If you run out of zap juice you can use it as brass knuckles. Did the museum indicate where the raygun collection came from?
It seems everything there was collected from abandoned warehouses, buildings, excavations etc. Pretty neat stuff from years of collecting in a municipal building, and then they decided "lets turn this into a museum!".