Indus Valley
In Ancient Indus Valley, not everything was made from pounded earth, but from something very similar. The first bricks were made of soil, clay and water to make squishy mud. Next they squashed the mud into a wooden mold which was the shape of a brick, quite similar to what you do with a sand castle. After they make this, they would set it in a kiln and fire it to make them very hard. All of the bricks from the Indus Valley held the ratio of 1:2:4, but could also come in larger sizes. After they fired it, they would place it along other bricks and slap on some mud to help it stick together, much like how we use cement between bricks. Their walls were so strong that many stood for 4000 years! Long ago there were various other jobs, like we have blacksmiths, they had a person who made various tools. Most tools were made with flint, but there were copper tools and even bronze. The tools they made were hammers, knives, needles, fish-hooks, axes, razors, and saws. But apart from these common tools, there were also stone querns to grind and make flour, and kilns to fire bricks. Other workers would make nets, bots, baskets, and beads, all these skills were passed down through the family.