Personal fireplace
We like to be huddled in front of our space heater on frigid winter days. Having an electric heater on all day is not practical since it consumes a lot of energy. On the other hand, a gas heater can be dangerous at night. For these reasons, many people choose to light a fireplace instead.
But what if you wanted a heat source on the table, close to your hands? Place some small candles (like tea lights) inside a glass container, and cover it with a clay pot with a hole in the bottom. The heat will come out through that hole, warming that section of the house. It’s like a mini clay oven.