Step 1: You Will Need
Step 2: Assembly
Step 3: Finishing
Now you can choose which holes to leave uncovered on the second, or drone, flute. You can cover all the holes, and just have a constant low D drone, which sounds nice but can be hard to maintain due to the differences in breath pressure for each flute. Or you can do what I did, and cover the top three holes of the drone flute. Then, with your right hand fingers covering the bottom three holes, and your left hand fingers covering the top four holes of the other flute, you should be playing in thirds.
I used masking tape to cover the holes, then decorated with paint, rhinestones, and O-rings. There you have it. An instrument worthy of your next Renassaince Faire or SCA event.