I got this idea from Plastorgan. This is a great project for the kids. Also check my webpage for more about the Windhooter.
Its wintertime and the wind is blowing. Make these "Wind Hooters" instead of wind chimes to add errie sounds to your yard. You can turn them off at night by turning the slots away from the wind (if they bother your neighbors).
Step 1: Cut the slot
Peel off the label and cut a slot lengthwise down the bottle about 1/4 to 1/2 inch wide and about 5 inches long. You can use a 2 liter soda bottle or even smaller bottles for the windhooter.