InSight is an intuitive technique to control smart objects with existing input devices in the environment, while simply looking at them. By leveraging the user’s line of sight as a heuristic of gaze and attention, the InSight system directs input focus from input devices to the device that the user is looking at, thus creating an intuitive metaphor: you control the object you are looking at. We contribute with technical details of the hardware and software implementation, and a discussion of single user and multi-user interaction possibilities.