The Altoona Railroader's Memorial Museum has several cool interactive exhibits. One is a news stand found in a railroad station. When you walk up to it, it triggers a video display of a clerk asking what did you want. Also there is a room with a bar in it found in any railroad town, also when you walk up to it a video comes on with the bar keep asking what was your pleasure. There is also a exhibit of a call boy calling train crews to work. Other exhibits show testing that was done by the PRR everything from light bulbs to oranges served in the diner cars. You can spend several hours there with all the hands-on stuff.
http://www.railroadcity.com/