I have actually been throwing in a few extra bells and whistles regarding technological advances (Based on access to local resources). Worldbuilding currently with stone age elves who only have access to flint, fish, and salt. They are currently dealing with a territorial wingless dragon who happens to fancy a spot they dedicated to their River God.
Sorry it has taken me so long to respond. I broke my leg and I have been laid up for a while. Theres really nothing much to it. For example I start out in the stone age and I just go through the process of learning what is needed to advance to the bronze age, like metallurgy and access to copper and tin.