Remember the “Dawn of Man” sequence in the film 2001: A Space Odyssey? A scrawny simian is crouching over a pile of bones recalling how he and his 97-pound-weakling tribe had all that sand kicked in its proverbial face earlier in the day. Then, suddenly, he gets an idea. Maybe these bones can help in some way. Maybe these disconnected objects that once comprised the frame of some unfortunate but tasty primitive beast can somehow be called to task to resolve a contemporary problem. Bone becomes weapon. The first tool is born.
In the interest of time, the film then skips ahead a couple hundred thousand years or so, but we can only imagine that our simian friend must have continued to experiment with this notion of better life though tool building.