Between 4000-2000 B.C., Egypt and Mesopotamia were the focal points for engineering activity. Stone tools were developed to help man in his quest for food. Mesopotamia also made its mark on engineering by giving birth to the wheel, the sailing boat, and methods of writing. Egypt also created the Step Pyramid of Sakkara and the Great Pyramid of Khufu.
Great Pyramid of Khufu: https://cdn.kastatic.org/ka-perseus-images/a9cc3f76fad57480efe3953a59868b35d27a3106.jpg
Stone tools: https://i.ytimg.com/vi/QBkSyzTI_vA/maxresdefault.jpg
YouTube link to Mesopotamia: https://www.youtube.com/watch?v=MKs5Wvv1-14