Februari 18, 2017
make this amazingly simple whistle using acrown cap from a coke bottle, balloon and scissors. you can use a torn balloon, andif you don't have one you can use a new one and cut it with the scissors. bottom portionwill be very useful in this. take bottom portion of balloon, open it and stretch it very tightlyon the mouth of the crown cap. stretch it tightly and you will find that the notcheskeep the balloon in place. the middle part would be stretched or under tension. now placethis in your mouth and blow at the top of this stretched membrane and you will heara very loud sound.
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