Hurdy-gurdy?
Yep, a stringed instrument. Two of mine have 6 strings, one has 7 strings, but you can get ones with up to 10 srings.
One type instrument can have 2 or 3 melody strings (the ones played by the keys) tuned in unison or tuned an octave apart.
The remaining 4 or 5 strings are drone strings, playing a continuous note like on a bagpipe (keys do not affect the drones). And to complicate matters, 1 or 2 of these drone strings can be a trompette (dog, or buzzing string) which makes a buzzing sound like a bee when the handle crank is turned properly.
Very complex instruments compared to a guitar, but once set up and tuned properly, a beautiful sound, truly unique sound like no other.
Good example, listen to this song:
http://www.dragonflybridge.com/HurdyGurdy/Songs/LikeSnowTheChimney.mp3