* A large, heavy-duty funnel
* A length of hose
* A large air tank
* A valve to control the air flow
* A siren or other noise-making device
* Two pieces of wood
* A drill
* Screws
* A wrench
Instructions:
1. Attach the funnel to the air tank using the hose and the valve. Make sure that the connections are tight so that no air can escape.
2. Mount the siren or other noise-making device to one of the pieces of wood using the drill and screws.
3. Position the funnel so that it is facing the siren or noise-making device. Make sure that the funnel is not too close to the siren or noise-making device, as this could cause the sound to be muffled.
4. Attach the second piece of wood to the first piece of wood using the drill and screws. This will create a stand for the fog horn.
5. To use the fog horn, simply open the valve to allow air to flow through the hose and into the funnel. The siren or noise-making device will then produce a loud sound that can be heard over a long distance.
Tips:
* To make the fog horn even louder, you can add a second funnel or use a larger air tank.
* You can also use different types of sirens or noise-making devices to create different sounds.
* Be sure to test the fog horn before using it in an emergency situation.