In this article, we describe just one activity from an interdisciplinary social justice unit taught to two fifth-grade social studies classes with the use of Cynthia Kadohata's multicultural historical fiction novel "Weedflower." Often, our younger students feel their voices are silenced...their messages are not heard. Like many of our fifth-grade students, the main characters in Kadohata's novel are marginalized peoples whose voices were kept silent during a time of war hysteria. In this historical novel, Sumiko, a young Japanese American girl and her family are forced to relocate to Poston Internment Camp after the attacks on Pearl Harbor. Poston, located in southwestern Arizona, was the largest of the ten internment camps (or "prison camps," as many of its former residents called it) operated by the U.S. government during World War II. While at Poston, Sumiko befriends Frank, a young Mojave Indian who lives on the neighboring reservation.