Our testers had a good time adding all kinds of other things to their Halloween Leftover Candy Bark, including treats they bought rather than just leftovers. This included gummy bears, dried fruit, flavored baking chips, and most exciting of all...Pop Rocks. Also, you can make Sweet and Salty Bark by swapping crushed pretzels and potato chips for some of the candy. Salted nuts would be tasty, too.