Jnkyrdguy wrote up this instructable for crafting a basic flute instrument from PVC piping. As he points out, the limited range could be an advantage to those new to the instrument – and its simple construction can easily serve as the basis for many experimental designs –
This flute design is a common one on the net, and for good reason. Not only is it simple to build, it’s also relatively simple to learn and rewarding to play. It only took a month of on and of playing to be relatively proficient (meaning I could get a clean sound from the first two octaves without difficulty.) The flutes are keyed instruments and only play in one scale (without more complex fingerings) which is actually a plus when just noodling around since you can’t easily hit a note outside of the major scale of that flutes key.
Making Simple PVC Flutes