I rewrote a Logo implementation in JavaScript in order to make a map of the train network in Taiwan.

http://peterburk.github.io/tra/

Existing maps were not bilingual, which caused me to take the wrong train and miss a concert. When I decided to redraw it, I wanted the map to not only have subway-style graphics, but also make the distance between the points be proportional to the time it takes a local train to travel between those stations.

If anyone else would like to use Logo to teach kids programming, and make time-proportional subway maps for other cities, please get in touch! I think it'd be a fun learning exercise.