Homemade Space Heater

I learned this trick from an older gentleman in my old ward. While growing up in Europe during the war, this idea was published in the newspaper. It's a Terra Cotta Pot Heater. You may be able to find a use for this somewhere. Here's how to make one:

What you need - two Terra Cotta Pots with hole in the bottom, a candle, and matches or lighter. One pot has to be small enough to flip upside-down and rest on the inside bottom of the other pot.

Place the candle in the center of the larger pot. Place the smaller pot upside down over the top of the candle. When lit, the pots magnify the candles heat. Now, obviously, you will want to use this where there is air circulating because of smoke; but, he said "we had three of these in our bomb shelter, and we were toasty."