Happy Song is a prototype game from Amnesia Fortnight 2007. You create your own band from a selection of animated musical monsters, then customize each band member to play an instrument of your choosing. Pick from an array of pre-made styles and rhythms and watch as your customized stylings come to life in vibrant animation and melodious zest. Some monsters can even sing based on your lines recorded via microphone! Happy Song is the original prototype for what would become the Sesame Street game Once Upon a Monster™, released for Xbox 360 in October 2011.