The United Nations and the European Union are extraordinarily complex institutions that pose considerable challenges for international studies faculty who work to expose their students to the theoretical, conceptual, and factual material associated with both entities. One way that faculty across the academic spectrum are bringing the two institutions “alive” for their students is by utilizing in-class and multi-institutional simulations of both the UN and the EU. Model United Nations (MUN) and Model European Union simulations are experiential learning tools used by an ever-increasing number of students. The roots of Model UN simulations can be traced to the student-led Model League of Nations simulations that began at Harvard University in the 1920s. Current secondary school MUN offerings include two initiatives, Global Classrooms and the Montessori Model Union Nations (Montessori-MUN). Compared to the institutionalized MUNs, Model EU programs are relatively young. There are three long-standing, distinct, intercollegiate EU simulations in the United States: one in New York, one in the Mid-Atlantic region, and one in the Mid-West. As faculty continue to engage their students with Model UN and Model EU simulations, new scholarship is expected to continue documenting their experiences while emphasizing the value of active and experiential learning pedagogies. In addition, future research will highlight new technologies as critical tools in the Model UN and Model EU preparatory processes and offer quantitative data that supports well-established qualitative conclusions about the positive educational value of these simulations.