The history of communication is rife with momentary blips; failed ventures and quickly replaced devices. One such example is the Pony Express. Operating for just over a year, it was the fastest, most reliable method for delivering written mail between California and the East.
The Pony Express Museum in St. Joseph, Missouri has done an excellent job of presenting the struggles and achievements made by the venture. There is some reading, but plenty of hands-on activities for little buckaroos.
I particularly enjoyed the archeological finds, such as the working well used to water the horses which had been lost and forgotten. Whether it's a day long excursion or just a stop on the road, be sure to check out the Pony Express Museum.
More photos here.