"When Lark set me this simple demonstration of how to heat a small room for about 15 cents per day, I was hooked. My engineer husband, Fred, was able to explain the rationale to me and we know that the Brits used a similar technique in their homes and apartments during WWII, but they did not have access to tea light candles, all of the same size. I realize that many tea lights are full of lead but in a desperate situation, thy could be used to my benefit. The British government told citizens to never leave their candles unattended. Years ago the size of the candles were uneven in both height and width and were extremely precious commodities during the war. Enjoy this 3 minute demonstration of how to heat a small room for 15 cents a day:"
Last year and the year before, the kids had big stones the put by the fireplace to heat up before going to bed. Those stones stayed warm until morning.. totally worth it.