In a warehouse on the edge of Hoboken, N.J., Andy Fundinger teaches students of all ages a fundamental lesson: how to call home. It’s one of several guided workshops at MakerBar, the hackerspace where Fundinger works, and part of the “Raspberry Python” instructional series. Pupils learn to build projects with a Raspberry Pi minicomputer and Python, a versatile programming language that powers apps, videogames, and more. Popular Science recently took a seat at MakerBar, pulled out a laptop and Raspberry Pi, and started tinkering with Fundinger. Have to skip class? Study our notes.