You could make one of these, Christopher / Mormon.
A 15-year-old girl has invented a flashlight that produces a usable amount of light just by using the heat from your hand. And if the judges at the Go ogle Science Fair like it, she may be on her way to the grand prize.
Ann Makosinski of Canada entered another Science Fair last year with a flas hlight that used kinetic energy to power its LEDs, and this year she wanted to try making one that worked via the thermoelectric effect. That's when a small amount of electricity can be harvested as electrons flow between the cool and hot sides of a material.