When Mimi, Papa, Christina and Grant visit a U.S. Park Ranger friend and her two children, the kids almost immediately embark on a GRAND adventure! Join them on an exciting tour--by helicopter, stubborn mule and tipsy-turvy whitewater raft--down the Colorado River through the Grand Canyon! 

LOOK what's in this mystery - people, places, history, and more! 
Grand Canyon, facts and history • The Navajo Nation History and customs • The Hopi Indian History and customs • Arizona history and symbols • Flagstaff, Arizona History • Geology of the Grand Canyon - Sedimentary rock - Mesa's - Colorado Plateau - Erosion • Kachina Dolls • Grand Canyon National Park - The Bright Angel Trail - Supai Village - El Tovar Hotel - The Visitor Center - Havasupai Indian Reservation • The Cameron Trading Post and The Little Colorado River Flagstaff, AZ.