Installations don’t have to be complicated to be fun. Color a Sound is more like an instrument, and it is not very difficult to operate: you use a colored marker to draw lines or shapes and you will hear the result immediately.
To keep things simple and easy to operate, also for a untrained musician, only the major scale is used. Blue dots can be drawn to trigger the sounds of a vintage 808 drum computer, although this does not seem to work very well because it is impossible to keep it running at a constant speed.