I've seen 3D plans for loud whistles. I don't have a 3D printer myself yet, but is it safe to put 3D printed stuff in your mouth? I know that there are ones that use plastic and ones that use resin, and I thought the resin ones were more toxic. But isn't plastic also a problem?
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@Quasit - It depends on the plastic used. Many use ABS for example which is used in all sorts of things including toys. its non-toxic.
As long as you're just blowing the whistle and not eating it, you'll be fine.
For 3D printers you might see if your local library or makerspace has a 3D printer you can use. you can often use them for free or a minimal price to cover materials
https://biocor.org/is-abs-plastic-safe-an-in-depth-analysis-of-its-safety-and-uses/
