This hands-on, interactive, in-person tutorial will provide an introduction to Wikifunctions. It will be co-organised with Nicolas Vigneron, user of Wikifunctions. We will first give a gentle, high-level overview of Wikifunctions. We will then lead the audience members in a set of introductory activities, each of which can be done through the wikifunctions.org site. These activities will include finding and calling existing functions; creating new functions, tests, and implementations; and editing existing functions, tests, and implementations.