There is no better way to learn about robots and electronics than building your own. Xpider is a small robot spider that you can build and control from your mobile phone. It also has a camera, so you can get a FPV of the action. The camera can be used for computer vision to recognize human faces.
To build this robot, you are going to need an Intel Edison, motors, a small camera, motor driver, screws, and a few other parts to get started.