From the Pyramids of Giza to the Memphis Pyramid, human beings have been making these triangular structures for eons. Because the structures have appeared in many ancient cultures across the globe, most children learn about pyramids several times over the course of their education. A popular school project is for students to make model pyramids of their own. Making a realistic pyramid project model for a class project can be easy and inexpensive.

Perhaps the most famous of the structures, the pyramids of Egypt have a long history and have been the focus of numerous films and theories surrounding their construction. The oldest pyramid in the country was built in 2,630 B.C, and the structures regularly found use as tombs for pharaohs, the country's royalty who claimed to be divine. Such was the Egyptians' skill at preserving the bodies of these rulers, that many specimens, known as mummies, survive today.

Not all pyramids have flat sides. Mesoamerican cultures like the Aztecs, Olmecs and Incas built their own pyramids with steps running along their sides. Built from around 1,000 B.C. up until the Spanish conquest of what is now Central and South America, these structures had many uses. Like their Egyptian counterparts, these pyramids had tombs but were also used for military purposes and, the Mesoamericans believed, to house their gods.

Pyramids are common around the world. They have a low center of gravity, and they are very sturdy structures. They appear frequently in nature, as in mountains for instance, and humans still use their shape in buildings to this day.