The Cub Scout Pinewood Derby that I saw -- in which the kid is to carve a model car out of a block of wood at home, to race at an event -- they had wisely issued extra kits ahead of time, for those parents who would get a little too enthusiastic about helping Junior, and had separate races among the parents' cars.

Of course, the stakes were much smaller than an award or school admission that potentially makes/breaks your child's brilliant future career.