The Smithers family find Grandpa's old time machine and decide to travel back to 1880 for their summer vacation. David and Jenny learn a lot about their heritage and history on their incredible trip.
Introduces cave geology and discusses spelunking, the sport of cave exploration through an adventure for survival in an underground cave.
Provides factual information about climbing Mt. McKinley based on the fictional story of a sixteen-year-old boy and his adventure climbing the tallest mountain in North America.
Calvin panics when he is caught in the 1924 Lorain, Ohio, tornado and races to find his family and make sure they survived.
