Here is a photo of some shakuhachi flutes:http://www.urbandharma.org/kusala/images/zenflute.jpg
If the bamboo is about 1" diameter or larger, they can make great flutes. You can make Japanese Shakuhachi (played with a basket on your head), Native American flute, a recorder, or a side-blown flute.
Important: You must heat treat bamboo or it will split as it dries. I can send you links to a great place to start.
The beauty of a bamboo flute is that you carry it everywhere and if anyone bothers you, it is tough enough to defend yourself with it. Just ask Kwai Chang 'Grasshopper' Cain. Or, if you're too young to remember "Kung Fu", he's also Bill, of "Kill Bill".
dont cut it all down, leave some for when you find an ible to need some.
large hut wet bar thing for a pool, blowgun, bows, whistles, people poking device, decorations.
Make a complete ninja arsenal. Then send it to me.
Why cut them down? I love bamboo. They're good for shade. I'll take them =)
send instructables on a search for bamboo projects their is quite a few to choose from