Eric made a couple of flutes with wood and aluminum tube. He says they’re easy to play and sound great. On his site he included tips on achieving the correct tuning too… – Link.

Related:

• FolkUrban Music – DIY instruments – Link.
• Make your own musical instruments – Link.
• Weird Instruments – Link.
• Collection of Homemade Instruments – Link.
• Musical Instruments: PVC Recorder – Link.