Toy manufacturers are making constant efforts to benefit from the legacy of Star Wars. The legacy is such that not even a single Star Wars-themed product has gone unnoticed. And donât be surprised if this Star Wars Darth Vader robotic arm is yet another success. Available for $40, this kit can be easily assembled with 45 snap-together parts making an arm. At the base are interactive controls with which you can extend and turn the arm, and even control fingers to grasp objects. No batteries required either.