These are tools that have been shaped and used by Aboriginals between hundreds to tens of thousands of years ago. He usually finds these on his outback adventures. The large, grey axehead in the middle is one that he found while we were working on the dam. I saw it in the ground and he reached down to loosen it out, immediately knowing what it was. A real Aboriginal artifact probably thousands of years old! How cool is that? The other rocks were used for milling grain.