With only a paper spiral and an ordinary pencil, you can make magic to wow your friends!
Cut out the above spiral very carefully with a pair of safety scissors. Then make a small dent in the paper so that it will not slip off the point of your pencil.
Balance it on the pencil as shown in the small drawing. Now hold it over a lamp or a stove or even an electric bulb, a source of heat.
You will see the spiral spin merrily around.