Amazon.com: Lego Mindstorms Ev3 Color Sensor : Toys & Games
Use Lego EV3 Sensors with Arduino - Hackster.io
Amazon.com: LEGO MINDSTORMS EV3 Building Set Includes 3 Interactive Servo Motors, Remote Control, Improved And Redesigned Color Sensor, Redesigned Touch Sensor, Infrared Sensor And 550+ LEGO Technic Elements : Toys & Games