There's a thread over at KVR Audio (
http://www.kvraudio.com ) about unusual muscial instruments. Take a look...
A two-string "klingon" bass:
http://www.pouringrain.co.nz/2string01.JPG A harp "sympitar" (with 39 strings!)
http://www.beyondthetrees.com/NDfront.JPG A Gravikord:
http://members.aol.com/gravikord/Instrument.jpg A "fire organ". I hope someone has good insurance. ;)
http://www.dwelle.org/blog/images/fire_organ.jpg An organ made from car horns by Wendy Mae Chambers:
http://www.danacountryman.com/csm/back/Number16/Car_Horn_Lady3.jpg Daxophone
http://www.windworld.com/feature_pages/feature_images/daxophone2.jpgApparently, it's a string instrument without the strings (i.e. a bow is used).
Waterphone
http://www.kult-ur-sprung.de/grosse_bilder/drei_waterphones.jpgYes, that's actually water on the bottom. Hee.
Phil Dadson's "Conference of Drums":
http://www.sonicsfromscratch.co.nz/uploads/conf_of_drums3.jpg Spidanebula
http://www.sonicsfromscratch.co.nz/uploads/spidanebula1.jpg Tenantennae
http://www.sonicsfromscratch.co.nz/uploads/Tenantennae.jpg[/img]These are also by Phil.
Oliver DiCicco and his "Mobius instruments":
http://www.mobiusmusic.com/redesign/images/home_instruments.jpg One of Ken Butler's "Anxious Objects":
http://blog.germuska.com/images/ken_butler_yello_cello.jpg Jean Claude Chapuis' glass musical instruments, which are based on the glass harmonica:
http://www.glassmusic.org/photos/photo1.jpg The original glass harmonica...
http://www.thebakken.org/exhibits/mesmer/glass-armonica.jpg This "Vibrotactile Suit" transforms a person's body into a musical instrument. (No beans required. :P)
http://hct.ece.ubc.ca/nime/2004/NIME02/cutaneous_grooves.jpg (Don't worry, I've never heard of these people, either. ;) )