The “Monument of Friendship” (MdF) was an obelisk constructed from more than 5,000 Jägermeister bottles in front of 216 LED panels with a surface area of 120 m². We developed a total of three customized interactive modules for this installation so that visitors to Kieler Woche could interact with the obelisk in a variety of ways. Using web sockets, smartphones and kickpads, users were able to control and play with the contents of the installation.