For the challenge in this chapter, you will need a 6 DOF (Degree of Freedom) robotic arm. The following image show what a 6 DOF robotic arm looks like:
For this challenge, you will need to figure out how to wire the remaining servo motors to the Arduino and the correct power configuration. You can order 6 DOF robotic arm kits from Amazon or eBay. Go to their site and do a search for 6 DOF robotic arm. Prices for these kits varies greatly depending on the size and power of the arm/claw. You can get the robotic arms prebuilt, or as a kit that you need to build yourself.