What did the native americans work with/do before the Europeans came?
Before the coming of the Europeans, Native Americans used wood-working tools, grinding stones, and other tools for hide scraping. Other new tools included the hoe, which was used to cultivate plants and dig up earth for the construction of burial mounds. http://www.museum.state.il.us/muslink/nat_amer/pre/htmls/w_tools.html has more on this.
From what I can tell, the native Americans were doing just fine before the Europeans showed up.