Once upon a time, connecting prototypes to web apps and UIs was slow, complex and buggy. Not any more. This talk is a crash-course in the skills needed for a front-end developer to connect to the world around them. It builds on my 10 years of client work developing and testing rapid, low-fi experiences for technology and mobility companies. The talk is split into three parts: 1) “Everything is a keyboard” → building and hacking physical devices to control Figma protos, Spotify, Keynote and other software 2) “Web Serial & Bluetooth” → how to use these new JS APIs to interact with Arduinos and electronics 3) “No prototype survives first contact with the client” → tips and best practices for building resilient, robust interactive hardware Technical demos will be interspersed with plenty of stories, such as my horror at watching the CEO of one of the world’s biggest car companies crashing my prototype off the stage the night before the Geneva motor show.