To answer your wife's question. You have a high carbon steel striker, piece of flint(pretty rock), charred cotton, and Jute twine in that kit.
Hold the flint in one hand with a sharp end of the rock facing up. In the same hand hold a piece of charred cotton just behind the sharp edge. In the other hand you hold the striker. Strike the flint with the striker. What you are trying to do is shave lil pieces of steel from the striker with the sharp flint. The lil pices of steel come off the striker as sparks. Hopefully you catch one of those sparks in the charred cotton. Once you do that you will have an ember. The ember will glow orange and become as hot as a head of a lit ciggarette. You need to seperate the jute fibers making a little nest. The fuzzier the better. Place the ember in the jute nest and blow it to a flame. Take care to hold the jute nest with the hot ember inside, over your head; so you don't get smoke in your face. When you blow it; start softly and blow harder as you go.
Good luck, its a fun way to make fire!