They created the wheel. They invented it around 3200 BC. The wheel was made of clay, rock, and mud witch it slowly developed into making wheels by joining together by wooden planks. They had the wheels connected to a chariot. Wood between the grooves of the roller were cut away to form the axle. The potters wheel was the first wheel ever used in Ur around 3500 BC. and that lead to the invention of the wheel used for transportation. They have discovered two leather Mesopotamian leather wheels used on a chariot.