How do You Make a Knife?

What kind of knife? We learned many years ago that you can make knife out of anything. You can even make it out of a toothbrush. All you have to do for that is to wrap it in several layers of saran wrap and light it with a lighter until melted. Then you will need to grind it across a brick or other hard surface. Let it harden and then repeat steps several times. It takes a while but it works.