Born-digital sources are, in fact, already old enough to fall into the domain of traditional, albeit recent, history. Bulletin Board Systems date from the 1980s. The European Organization for Nuclear Research (CERN) launched the first website and server in 1990. Websites and the new digital media are cultural artefacts. Archivists and librarians now view their preservation as essential. The site Twhistory.org provided the template for the project described in this article. This site acts as a clearing house for Twitter re-enactments of historical events. The structure is simple. Students create Twitter accounts for historical characters. Then, using primary sources, they tweet "in real-time." Historical re-enactments are fraught with epistemological and methodological issues. They are conjectural, fictive, and dominated by non-historians. Nevertheless, instructors can embrace the epistemological problems and turn them into a central issue for class discussion. Rather than delegitimizing the simulation, these issues can be used to introduce students to post-modern critiques of history writing in general. In addition, re-enactments are immersive and require no wardrobe budget when done electronically. Finally, when carefully planned and assessed, re-enactments promote student engagement and active learning.