Pixy Lego is a smart vision sensor you can quickly ''teach'' to find objects. It saves you time by only outputting the object data you're interested in. It connects directly to Lego
wiki:v2:overview [Documentation]
Pixy2 Smart Vision Camera - AndyMark, Inc
Pixy2 CMUcam5 - SEN-14678 - SparkFun Electronics
Pan/Tilt Kit for Pixy 2 CMUcam5 Image Sensor
Camera PixyCam ver. 2 CMUcam5 - a smart image Botland - Robotic Shop