How To Build Vezon And Kardas Where Can I Find A Website That Gives Ideas And Tips On How To Build A Robotic Arm (unpowered)?

Where can I find a website that gives ideas and tips on how to build a robotic arm (unpowered)? - how to build vezon and kardas

I am building a robot arm for my technical class and I have to create a document from the design process. For my research I have to point a Web site with information on the robot arm found (no motor, no motor / battery). This site may contain some tips on how a robotic arm. Any help is greatly appreciated.