"the diorama is built so that certain objects built as part of the diorama also work as tines, which hit sensors as the diorama is turned in such a way that the organ's keys are pressed, which plays the music. If you moved some of the bricks, at least at the height where they touch the sensors, it would fail to play the theme"
BEHOLD.................
http://www.youtube.com/watch?v=g5Lgcen-PGI
BEHOLD.................
http://www.youtube.com/watch?v=g5Lgcen-PGI