by Cecile Cinco
There are places where you can’t live without a heater during wintercold times and you can’t live without an aircondition during summer or hot times. I’m blessed to be from the Philippines: not the hottest nor the coldest. Just hot and hotter. 
Ok, let’s assume you need a heater because maybe for some reason or another your heater is not functioning, or you lost it, or you broke it or something. Whatever. You just found out you need to have a heater now.
All you need is something that you can attach a plug at one end and tin cans at the other end. It could be a flat cord (ideal) or even a solid wire or stranded wire that are not stuck together in the first place. That can do. The point is, you have one continuous wire about a meter long (or 2 or 3 meters long) that is attached to one terminal of your male plug and another for the other terminal.
If you can choose between solid and stranded wire (gauge #12 perhaps), each has its own advantage over the other.
If you will use a solid wire, that’s all you need. If stranded wire, you need 2 pieces of tin plates even if just 2 square inches.
Imagine this: if you have a cord with a plug and nothing attached to the other end, you just make sure both ends will NOT touch each other when you plug it and dip the two terminals under water, you’re set. Just DON’T TOUCH the water as you will get your shock of the day.
That alone will make the water hot. To make it hot faster, though, you need the tin plates attached to the 2 terminals then you can dip under water. Just make sure both ends will not end up touching each other or you’ll get electrocuted.
With solid wire, you can make each end (the one you soak under water) formed into coil, again making sure both stay apart from each other when you dip under water. Connecting the plug on the other end will be quite difficult, though, with solid wire, especially #12.
When you’re done, you can plug and put the newly-made heater in the pail of tap water.
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