 In both the 2006 and the 2012 retrospectives some theme mixing traditional fluxus themes (like 'One for Violin' executed in 2006 by Nam June Paik) - a portable and explosive version of Piano Activities and Ay-o specific themes are present.As can be seen on some of his T-shirts, Ay-O likes to identify with a mythological creature from Japanese Folklore.The name of the creature is Kappa (folklore).