cool i've never heard of those before. sounds like a laugh. you should get one and serenade your wife, she'll not shoot you then. i have an instrument at home that is like a round frame with a wooden bell shape on the bottom and two strings running down the middle. when you pluck the strings and squeeze the frame it stretches them and creates different pitches (sounds kinda like a
slide guitar, although pretty limited) but i dunno what its called. its loadsa fun! i got it from a little stall at glastonbury arts and music festival. and a didjeredoo, i love strange instruments.