Teotihuacan, the most important city of pre-Aztec central Mexico, was, at one time, one of the largest cities in the world.

It was the region’s major economic as well as religious center.

At its apogee, it supported a population of 200,000 people, and encompassed some eight square miles.

The Pyramid of the Moon was located at the end of a street called the Street of the Dead.

As morbid as it sounds, this impressive structure mimics the contours of the mountain Cerro Gordo, just north of the site.

To help your little one understand the beauty of this magnificent structure, we created the Pyramid of the Moon with boxes in small groups of three to five kids.

Each student stacked boxes atop one another, and then gleefully knocked them down.