Make: Action is your gateway into the world of actuators and transducers: the counterparts to sensors. Just as sensors let you monitor the real world, these devices let you do things in, with, and to things in the physical world. You'll learn how to display things with LEDs and displays, move things around with motors and pumps, and create sound and vibration. Sensors let you know what's going on in the world; with Make: Action, your projects and creations will shape the world around them!