Behavior is an interesting challenge for architects because architects are used to detailing with physical material or matter. Everything that goes into the visible outcome or behavior of interactive projects can be divided into two main components: hardware and software. The hardware consists of CPUs, microcontrollers, microphones, depth cameras, power sources, and data/power cables. The software consists of custom-made interfaces and off-the-shelf software, mainly TouchDesigner. The chapter discusses a series of projects that showcases a variety of ways to explore how interactivity is not only technically designed and detailed, but also how the behavioral outcome is a result of an integration of traditional construction details and the back end. The formal qualities of each of the projects is determined by practical use along with intrinsic values of the materials used. Each project took a pragmatic approach to aesthetics.