An acorn cap makes an extremely loud whistle when used properly. If you are looking at your two thumbs, place them together. Separate the tips of the thumbs to make a V. Hold the acorn cap in your ...

Y'know, if you hold it right in your hands, you can also do this with the cap of a plastic soda bottle. I learned this when I wanted to whistle, but there weren't any acorn caps around because of the lack of trees. It's even more fun to use bo

How to Whistle Using an Acorn Cap. Whistling with acorns is a trick that is easy to learn and teach, plus, it is very effective at getting attention and amazement from friends. Additionally, it can save your life if you are lost in the...