Gorgeous illustrations visualize the folktale history behind the Quetzal bird in the kingdom of the Mayans. The picture book is rich in pyramids, agriculture, jungle flora and fauna, and Mayan mythology.
I don't know which grade levels look at ancient civilizations or cultures of the world, but this folk history would work well in either unit. Culturally, the author exposes the reader to the reverence for heaven (in Mayan culture there are 13 heavens), mathematics and agriculture, and omens associated with hummingbirds and quetzals.
It's easy to enjoy the attention to attire, the use of jade in jewelry as well as in weapons, the intricacies of headdresses, and the meaning behind colors (black and white signifies slavery). The presence of architecture is richly displayed in this picture book, and my favorite page is page thirteen (significant number) where thirteen stars paint the night sky. The father and son get to share this magical moment from the top of a pyramid platform.
Page six of the text features an illustration of Mayan numbers: two straight parallel bars with three round stones above it. Each bar = 5. Two bars = 10 + 3 stones = 13. The repetition of thirteen throughout the text and the illustrations is a wonderful little cultural "in".