This strange “Radio-Controlled Screwdriver Car” was made from “two cheap, cordless power tools with wheels attached. The electrical control part consists only of an old R/C controller, two servos, and 4 microswitches”. Video demonstration after the jump.
Since I had most parts already in my part bins, it cost me about 20$ to build. It can drive and steer without electronic drive motor control – it uses switches only
[via HackedGagets]