Pianos.

[Slender]

I've never had so much fun smashing my keyboard while falling asleep.

Randomly found while using StumbleUpon. Enjoy.

http://touchpianist.com/

[Kafka]

I am pretty much a piano master after playing that

Was fun, thanks for the link

[Clam]

As a really terrible key-pounder, this is incredibly wonderful and exactly how I imagine it would feel if a genie granted me a wish and I wished to be able to play piano super well. Now all we need is some way to modulate the volume of each dot thing...