Halloween Candy is a headache for parents. It's basically a bunch of empty calories and too much sugar going into their child's mouth. In fact, dentists say there are some candies that cause so many problems that they're in a class all by themselves. Here's a rundown of the absolute worst candies for kids' teeth: Super-Sticky Taffy Bars--these are the absolute worst because they stick to all the nooks and crannies in your teeth and are nearly impossible for kids to brush and floss out on their own even with multiple brushings. Gobstoppers and Blow Pops---not only are they pure sugar, but they're really just hard 'rocks' of candy that kids tend to bite down on, putting them at risk of breaking teeth. And Gummi Bears, Twizzlers, Tootsie Rolls and Skittles--these are all candies that stay in your mouth for a long time.  Amazingly, the best candy for kids' teeth is plain old chocolate, like a Hershey Kiss, because the sugar is more likely to wash away with saliva. (www.nydailynews.com)