Arduino is an open-source physical computing platform and a development environment for writing software to create interactive objects, from controlling lights and sound to motors and sensors. This workshop introduces the basics of physical computing, from installing the development environment to creating a circuit and programming LED (light emitting diodes) to flash on and off through code. Students have the opportunity to set up a circuit board from scratch and experiment with circuitry, as well as manipulate the instructional code and even create their own.