When the Spanish encountered the native people of South America in the 15th and 16th centuries, they marveled at the abundance of gold and silver. In fact, the ancient peoples of Peru began making things from gold and silver about 3,000 years ago! Readers will be as fascinated as those first Spaniards were with the inventive and useful items the Aztec, Maya, and Inca cultures created before any Europeans arrived in the Americas. From hieroglyphs and...