The Call of the Didjeridu

The DIDJERIDU...
Didjeriwhat ?
Where does it come from ?
The Aborigines... who are they ?
That's not a musical instrument... is it ?
How does it work ?
Where can I put my hands on one ?
Is it possible to craft it myself ?
How do you breath in and out at the same time ?
And how do you produce all these strange noises simultaneously ?
Didier heard the Call of the Didjeridu.
Along with his cunning dog Ridoo, he will find the answers to all those questions through his different encounters.