Personal Piano - Toy

What is new about this toy? 

There isn't much new about the toy, but I thought that it would be fun for beginners to play some familiar songs without having access to a piano. I even provided step-by-step instructions on how to play the music to make it as easy as possible.

What expectations are subverted? 

In my game, you can either play the songs I provided or discover new ones for yourself (within the range of one octave). 

What core human emotion or instinct might be satisfied by playing your toy?

Either the satisfaction of completing a song or discovering a new one, depending on how the player chooses to play.