We visited their museum which was founded in 1858. "Visitors can take a plant tour and visit the Callahan Museum which is housed in the 1883 section of the facility. Exhibits include historic, tactile books, maps and globes, and a collection of mechanical Braille writers."
This is how they do math!
It's a Brannan cubarithm slate:
Their typewriter:
Look what else you can do with Legos!
