How to build a gripper for Lego Mindstorms EV3, NXT and RCX - YouTube
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
LEGO MOC EV3 Robotic Arm with 7 DOF + Gripper by mr_majczel | Rebrickable - Build with LEGO