The Touch Board from Bare Conductive was in fact the best technology for this project. It’s a microcontroller with 12 capacitive touch electrodes, an mp3 decoder and an audio jack output. Used with the Electric Paint, it was a perfect match. I used two boards, each one connected to one audio jack while each button was connected to an electrode of each board. This way, by touching one button, the user could play the recordings in two different languages at the same time.