WTPh? (What the Phonics) is an interactive installation set in the touristic areas of Copenhagen. Street names in Denmark are close to impossible for foreigners to pronounce, so we did a little intervention :-)
We recorded a Danish person speaking the street names then split up each syllable. In true karaoke style, we placed lights above the matching syllable so that in real-time, you can see which part of the word is being spoken. When participants lift the speaker off the wall, it starts playing. We used Max/MSP and Arduino to build the installation.
This looks cool and also pretty effective. And potentially useful for vision-impaired people, in addition to tourists. I wonder if one could use signs like this for learning language more generally, like vocabulary items around a classroom or something.