There is no better way to learn electronics and robotics than building and programming your own bots. JavaScriptMikeC has shared a guide that shows you how to build your own Mars Rover like robot. The rover can be used to roam anywhere you get WiFi coverage.
The robot can be driven from a computer. The night vision camera lets you see in complete darkness. You are going to need a Runt Rover, Roboclaw 2x7A Motor Controller, voltage regular, 5000mah battery and a few other parts to get started.