A very interesting apparatus made of aluminum foil might be the home made electroscope that can detect electromagnetic fields and ionizing radiation. As this device is placed closer to a router it will detect the strength of the electromagnetic field. This apparatus should be able to detect the direction of incoming ionizing radiation.
Making an electroscope for a science project is not only exciting, but easy. An electroscope is a scientific measuring instrument that detects the presence of an electrical charge. When an electroscope detects a charge, the flaps on the end will move away from each other.
sciencing.com
A more common apparatus made of aluminum foil is the smoking pipe.
Aluminum foil pipes are commonly used for smoking marijuana or in emergency situations when another pipe is not available or affordable. However, these must be used with caution. Foil pipes are safe for only one or two uses. Over time,...
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A very good use of aluminum foil that many people might benefit is the foil ball apparatus used in the dryer that will discharge static electricity.
Dryer sheets are an obvious way to combat static buildup in the dryer. But there's another solution: aluminum foil.
www.cnet.com
Aluminum foil is not just for hats.
Bill