When his father takes him to visit Florida, Buster sends postcards to his friends back home telling them what he is learning about surfing.

Grandude brightens a dreary weekend for his visiting grandchildren, Lucy, Tom, Em, and Bob, by using his magic compass and postcards to take them on adventures around the world.

Mrs. LaRue takes a cross-country drive with her hospitalized neighbor's cats and her own dog, Ike, who keeps the cats' owner informed of their misadventures through a series of postcards.

Buster meets new friends in San Francisco's Chinatown who teach him about the Chinese New Year and good luck symbols in Chinese culture.

One day, Duncan is happily coloring with his crayons when a stack of postcards arrives in the mail from his former crayons, each of which has run away or been left behind, and all of which want to come home.