Sorry Alison I spelt you Allison. My Alison only has one "L" and, it appears, so do you.As far as didge and percussion goes. . . I figured that I use all four limbs so I should use my lungs as well. And being a "real aussie bloke" singing is something I have not been courageous enough to do.
So I just breath into a hollow tree limb and blow rasberries in time (very toneful rasberriesof course - or so Mick from Didgeriblues says).
And, not satisfied with that I am designing a triple slide didge (trombone style)and a talking snare drum (pitch change by pushing knees together whilst seated).
So,,, thats both feet, knees, both arms, 10 fingers, lungs and lips (no wonder I pull such funny faces when I perform).
Seeyas ;-)