ARIZONA -- Two schoolgirls eagerly volunteered to bake a cake for their Estrella Mountain Elementary School carnival in Arizona. The good deed was to be the prize in one of the carnival competitions. But instead of flour, eggs and sugar the girls used dog excrement, pond water, and laxatives to make the batter. The girls were nice enough, however, to top the cake with whipped cream and Snickers bars. Something (probably the smell) must have alerted officials, and the "treat" was confiscated before anyone could eat any. The girls were questioned and could be charged with conspiracy to commit assault. The offending prize was taken to a laboratory for ingredient analysis.