Hamster Car !
My brother and I built a jeep-like device out of Lego Technics with a bit, square, airy cabin on top. The front section of the floor of the cabin was hinged centrally and downrods from each edge engaged the steering mechanism through gears to give a degree of steering by walking around. Over the hinged steering-floor and also the rear of the cabin were strips of cardboard with tinfoil glued within as electrical contactors.

Two relays interfaced these to the motor so if the hamster was facing forward, the vehicle moved forward, if it backed up the cabin or turned around it pressed the other switch and the vehicle reversed. Moving to either side of the cabin would steer the hamster jeep in that direction

In theory the hamster could drive the jeep in any direction merely by moving to the window on that side or corner of the cabin and looking out.

Little furry bastard paid no attention to his driving lessons and would dash from side to side causing it to click loudly and go nowhere (very low geared so as not to be too much of a handfull for little hamish to handle)

then he had a poo in the contactor and we gave up.
(Carpe Cyprinidae, Wed 30 Oct 2013, 17:02, Reply)