[xoxoxoBruce]

Well there was good reason for the law when it was enacted... in 1938.

First was the idea that they weren't allowed to put anything non-nutritive in food, which is a pretty good idea. No bulking up the food with sawdust and shit.
Secondly the idea of toys embedded in candy is a choking hazard for the under 3 set.

The problem is once the law is passed, nobody wants to make a reasonable judgment on an individual item like the Kinder Eggs.

Might be some campaign contributions by American candy companies too.