Assumedly, the main purpose of a banana (cucumber, zucchini, etc) is to be relished at some stage. Yet, young American inventors Jay Silver and Eric Rosenbaum have contrived a new means of putting them to use: by eliciting from them authentic musical sounds, like for instance, those of a piano.
A dollop of wobbly jello does work as well and a great number of other materials also prove to be conductive: most fruits and vegetables, shrimp or pizza pie (although some may consider that a bit yucky). Plants will do fine and play-doh (given a certain degree of moisture) and metal objects such as foil, cutlery or pots. Even simple thick lines drawn on a smooth surface with a soft graphite pencil can do the trick – so can live people. What in God’s name are we talking about? A kit called MaKey MaKey.