Everyone can collect such a whistle. It will take no more than half an hour to make it for a beginner. An experienced do-it-yourselfer will assemble such a whistle in less than 10 minutes with the necessary materials and tools. Whistling in such a whistle is quite easy, and it is quite loud.
As an option, the whistle can be made from a sheet of copper or aluminum, and then polished, as an ornament, engraving can be done. It will be a pretty stylish homemade.

Materials and tools for homemade:
- thin sheet metal (suitable from a tin can);
- paper;
- pliers;
- scissors (you can work with a tin can with ordinary scissors, however, they will become dull);
- pen, felt-tip pen, pencil or carnation (you can use another writing instrument).

Let's move on to making a whistle:

Step one. Homemade drawing
In total, two different drawings are presented, you can make a whistle according to any one you like. If there is no desire to draw everything, then the drawings can be printed on a printer, the scales are saved.

Step two. whistle material
In general, ideally, the metal for the whistle should be slightly thicker than that of a tin can. If this could not be found, then an ordinary tin can is also suitable for these purposes. By the way, you can also use cans from drinks, but there the metal is very thin and soft, so the whistle will be fragile, and it will be problematic for them to whistle. Nevertheless, the author managed to make a whistle from such a metal.

Step three. Drawing Transfer
After the drawing is drawn or printed on a printer, it must be cut out. Next, this paper template must be attached to a sheet of metal and circled with a felt-tip pen or scratched with a nail. After that, the workpiece can be cut with ordinary scissors, but it is better to use the old ones, otherwise they will quickly become dull.

Step four. Whistle formation
The difference between the two whistles shown in the drawings is only in their front part. This is what the first type of whistle looks like.

And this is what the second type of whistle looks like

The only difference is how the petals are bent. To form a gap, you need a strip of metal of the desired width. It is placed on the workpiece, and then you can bend the edges. In the photo, the shaded part is the very strip of metal around which the petals are bent.

At the final stage, you need to work with pliers, you need to squeeze the edges well so that the formed gap has a strictly rectangular shape. Well, then the sheet of metal can be removed.

Now you can start creating the cylindrical part. To do this, the remaining part must be bent in the form of a ring. To do this, you need to use some kind of cylindrical object. If the metal from which the whistle is made is thick, the edge must be sharpened.

That's all, the whistle is ready. To whistle, the whistle at the edges must be pinched with the thumb and forefinger to form an almost closed cylinder.

Step five. Setting up the whistle
It happens that a homemade whistle does not whistle the first time, but this is not scary, it still needs to be adjusted. The ring part must be bent in different directions until a whistle appears. You can also try to adjust the width of the gap "b".

Similarly, you can set the desired tone of the whistle. If no sound is heard, this does not mean at all that the whistle is not assembled correctly, it is quite possible that it emits an ultrasound that we do not hear.

In the video below you can see how you can whistle with your fingers.

According to the author, such a whistle whistles much louder than a plastic one. And it is also quickly and easily assembled from improvised materials. If desired, a ball can be placed inside the whistle, while it will turn into a football one.