Step 1: Make the Body
First you need to cut off the end of a tin can. Then you need to cut slits in it. Then you smash the bottom with a butter knife or something hard.
Step 2: Prepping
Put in a rolled up napkin. Fold tabs so it closes the napkin in. Put in any kind of flammable liquid such as rubbing alcohol. Put a corner of the napkin up as a wick and light.