Buster sends postcards to his friends back home when he and his father visit an international food festival in Wisconsin, where he meets six girls who will be performing a traditional Hmong dance.
When his father takes him to visit the Louisiana bayou, Buster sends postcards to his friends back home telling them about the Cajun language, learning to catch crabs, and keeping watch for a swamp monster.
Buster and his father visit South Dakota and send postcards home describing their visit to the Crazy Horse monument, their experience with buffalo, and more.
When his father takes him to visit Vermont, Buster sends postcards to his friends back home telling them what he is learning about maple syrup and the "mud season."