How long is the Great Wall of China? How tall is the Great Pyramid of Giza? What are they made out of? Who built them? These questions and more will be answered in this World Wonders series. Each book will also have awesome historical and current photographs. Aligned to Common Core Standards and correlated to state standards. Abdo Kids Jumbo is an imprint of Abdo Kids, a division of ABDO. Written by native Spanish speakers--and immersion school educators.