This is a Max/MSP driven react-table. The user can mix beats and
synths with effects by placing, moving and rotating blocks on a
back-lit glass surface.  It was created for public use and has
been shown at various events across the south-west including
Bristol Festival.
Some effects only affect the closest sound source, others affect all relative to their distance appart.  All the sound loops are inter-changable and with very little effort, some unique and bizarre sounds can be made!
Here are a couple of pictures of 
tangiblocks being used at Bristol 
Festival 2009, courtesy of Matt