While on detention for disrupting a science lesson, Kenneth and Aleesa are transported to 1939 where they try to protect the privacy and even the life of Albert Einstein as he struggles to decide whether he should help build an atomic bomb to stop Hitler.
While on a field trip to study native plants, Kenneth and Aleesa are transported to Hawaii in the 1890s, where they see first-hand the final days of the reign of Queen Liliuokalani and learn about native rights.
When their father loses his job during the Great Depression, a brother and sister are forced to live with their hated cousins on a farm in North Dakota.
While on detention for passing notes during a history lesson on Cesar Chavez, Kenneth and Aleesa are transported to a vineyard in the 1960s, where they see first-hand what Chavez, the union strikes, and the Schenley boycott did for migrant workers.