text: I not sure of your Age. I have an idea. So, if you are interested in this Field, I do not think a "Kit" what you want. You should research and learn about Robotics. I assume you mean building a Robot, there are other things. Actually this is not a hard Field, it is only limited to the Technology at hand. IF, you have a good understanding of Mechanics, Electronics and Lever Systems, you can make your own kit from "Junk" laying around. Cheap Remote Control Cars/Trucks can supply cheap electronics for the Operation of Movement for your Robot. Universal Joints/Bearings from cars can provide Elbows/Knees and Rotational Movement as in, Wrists/Head. I hope this helps you.