But we happened upon the Game On traveling exhibit, which I'd been curious about since it started in 2002. Some highlights:
two models of "Computer Space", the first arcade game. This gorgeous cab was sculpted out of clay by its designer in his kitchen. I've only seen these turned off, but allegedly the game is impossible to figure out. In the center is the computer used to design and program it via punch-card interface.
Magnavox Odyssey, the first home system. the paddles are out of the case so you can play it on a screen up above, like the hundred other consoles on display.
A Nintendo "Virtual Boy", the first 3D game system, which I'd never tried before. It's monochromatic, but that just adds to its character.
There's another room of arcade machines circa late 70's-early 80's, all set to free play, but none were rare enough to warrant mention. Also a few pinballs, including an Atari "Space Raiders" widebody, but they're too badly maintained to be enjoyable.
The majority of this enormous exhibit is console games from the 90's to the present. I'm not into that stuff, but most guys younger than myself might be. Also lots of conceptual drawings, so game designers especially should love this show.