We are surrounded by electronics - smartphones, computers, TVs, robots, and more! While lots of students have learned to code, few have had the opportunity to build the physical system which opens up a brand new world. In this class, we introduce students to circuit and Arduino, one of the most popular single-board devices. The class uses an Arduino simulator and does not require a physical device. However, if you prefer, Arduino can be purchased online. The same code will work on the device without any changes.