The First Hominid Age, generally called the First Age, was marked by hominids developing forms of agriculture, including both cultivating crops and raising livestock. This allowed them to settle into stable communities and develop civilizations – towns, villages, and eventually kingdoms and empires.
Although these hominids developed tools, much of that was limited because the abundance of Dream Force allowed for the use of magic to aid in both simple and complex tasks alike. Metalworking, for example, could be done without the use of modern forges, and tools like forges wouldn’t be developed until the Seventh Epoch, when Dream Force was much less plentiful.