I take my truck to some local shows each summer. Not because it is pretty(it is not) but because it is kid friendly. There should be one old car/truck that kids can touch. I pop the negative cable off and drop the tailgate. Leave the doors open and block a wheel. 52 1/2 ton foot starter and a 4 speed. No battery means the truck won't move, and nothing can be turned on. Love to watch the kids "shift" and make engine noises. Fun stuff. When the show is over, just set the heater switch, wiper switch, and pull the cigar lighter out. Hook up the battery cable, drop the blocks in with the lawn chairs and away we go. I have run a 6 volt car starter, with a good after market big contact horn button clamped to the steering column. Worked fine. But the button could be bumped at any time, so the same issues applied. Now for some heresy: A Ford starter relay can be used to serve as a safe way to convert a foot starter to a button starter. Any good push button switch would work with that. This could be run through the ignition switch for safety if you choose.
