The ingenious One String Canjo is probably the easiest stringed instrument in the world to play. Based on the "Diddley Bow" which originated in the USA, the Canjo consists of a tin or wooden box , a wooden neck and a string. The Spatchcock and Wurzill Canjo is fretted using a dulcimer or diatonic scale, which basically translates as a major scale, or the white keys of a piano.
By using a very simple play by numbers system even someone who has never picked up a guitar before can play a recognisable tune within 60 seconds of holding a Canjo. The Canjo is supplied with the booklet "Introduction to the Canjo"