Merc, from that same link there is an interesting article on training children. Since I don't have any children I don't know how effective the suggestions are, but I hope they're very effective, and, if so, I hope all parents in the world immediately implement these procedures.
It's a three-part article, starting
here.
I thought parts 2 and 3 were the most useful. The links for those can be found at the end of the first article.
I hope someone with kids tries some of these techniques then reports back. It might improve your chances of getting your car fixed.