I wonder what kind of robot you could build out of a cellphone battery, an old non-wireless laptop network card, a mechanical pencil, two flashlights and a 6-volt drill without any drill bits? I bet it would be pretty cool if you could get it to work.
I could probably get some scrap metal from the mine, if you have any ideas. Not to mention all the coal you could ever need, should it be powered by coal rather that cellphone battery. Can you imagine the robot you could make out of this kind of stuff: