Identifying the Main Idea of a Children's Book Series

The following passage describes a popular children's book series:

The "Magic Tree House" series follows siblings Jack and Annie as they embark on numerous adventurous journeys through time and space. Each book takes them to a different historical time period or a fantastical place, where they learn valuable lessons along the way. The series, authored by Mary Pope Osborne, appeals to young readers due to its engaging storytelling and educational content.