Esperanza International organizes international service experiences to integrate young people into foreign cultures and promote a sense of global citizenship. On service trips, participants enact urban-development projects, building sustainable housing in Tijuana and setting up solar panels in Oaxaca alongside local residents. They build the homes with support from local families and the Mexican government. Each house exists in a community setting of at least 10 families. The families and participants work together to create homes incorporating the Haener-block system, which involves building walls from concrete blocks using mostly volunteer, unskilled labor. In the evenings, participants interact with their temporary neighbors to dispel stereotypes and build a network of understanding through excursions to sporting events, orphanages, and clinics.