When you explain how to make everything you have to get to a point where you will start making your own tools. What about the tools for making the tools? Andy condenses 3 million years of human innovation into one challenge as he attempts to make his very own iron tools from scratch. He has to learn how to make fire and flint tools. Andy travels deep into the earth to gather iron ore. He learns how to blacksmith. Then Andy travels into the woods to build his own bloomery and smelts his own iron.