To make a didgeridoo, cut a 3 1/2 to 4 foot length of 2" PVC pipe (I used 1 3/4" pipe for this instructable, but you can get a better and deeper drone out of a larger diameter pipe).
Heat the PVC pipe IN A WELL VENTILATED AREA with a propane torch and bend or twist the pipe in several places.
Make a mouthpiece by softening some beeswax. I used a microwave to soften my beeswax, cutting up the wax into small chunks and microwaving it on high for about 20 seconds at a time until soft enough to mold. Warning: wax will go from solid to liquid in an instant, so only microwave it in small time increments, checking each time for softness.
Once the wax is soft enough, mold into a doughnut shape and cover one end of the PVC pipe with it. Make the center hole small--though how small depends on the mouth blowing into it. I have a small mouth, and my mouthpiece has to be about the size of a quarter, but oblong (not perfectly round).
Paint your didgeridoo with bright colors and aboriginal designs.
Note: there are other ways to heat and bend PVC pipe
which I haven't tried.