The guys over at Instructables have been playing around with a project that involves LEGO and music.
A month and a half later they’ve combined the two to construct these amazing LEGO headphones. Even though they may be a bit bulky to begin with, as I should imagine you would have LEGO bricks slightly protruding out, it’s still awesomely cool. All they need to do now is to find out how to insulate the sound. Still very clever though.