PEN BIRD WHISTLE
thingiverse
This uses a BIC Round Stic for a insert https://www.amazon.com/s?k=BIC+Round+Stic&i=office-products&crid=2VD4I85T4U4XJ&sprefix=bic+round+stic%2Coffice-products%2C154&ref=nb_sb_noss_1 To play sounds blow in the end and hold or tap the first hole. To hear what it sounds like https://youtu.be/uvCYbqac6sE
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