"Spot On", Jenny!

Bob's on the money about returning boomerangs, although he omitted the Aboriginal use of nets in such activities. Most of Australia's Aboriginal language groups used clapping sticks of some kind or other and, because of the loss of linguistic detail we now have only a few words from some groups to describe the 'sticks'. Curved boomerangs give a distinctive double percussion and were almost universally used rhythmically. Woomeras (familiar to Americans as "atl-atl"s) were also used and, where didgeridoos were used there was a concentration on particualr types of wood used for clapping sticks.

Ethnographically, didgeridoos appear not to have been decorated with all the acrylic dot paintings used currently. There's a bit of uncertainty about whether the termites' hollowing out of the trunk has left vagaries of internal shape to the tube that influences timbre but musicians like to argue over such things. A didge is really just a long tube and you use your own internal air column to influence the air column in the tube, so it's no magical thing that you can make a didge out of PVC pipe or black agricultural poly pipe, just so long as you make a good mouthpiece. Clay or beeswax are 'traditional'.

Cheers, Rowan