[youtube https://www.youtube.com/watch?v=5c3gjv-qrl0?rel=0&autoplay=1&autoplay=1&modestbranding=1&w=580&h=385]
This really loud whistle is also known as a “pea whistle” because it has a little ball, or pea, inside that gives it that recognizable trilling sound. It’s quite easy to make. If you don’t…
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