<a href='http://www.csl.sony.co.jp/IL/projects/blockjam/index.html' >Block Jam</a>

"Block Jam is a musical interface controlled by the arrangement of 25 tangible blocks. By arranging the blocks musical phrases and sequences are created, allowing multiple users to play and collaborate."

+ <a href='http://www.csl.sony.co.jp/IL/projects/blockjam/downloads/BlockJam_0.mov' >video of a prototype</a>