An article in LakeInTheHillsPatch mentions candy experiments as one way to use up candy experiments, saying "Older kids will have a blast running experiments with their candy. Check out CandyExperiments.com for some cool science experiments that go beyond exploding Mentos in Coke..."
It's always fun to be mentioned, and I agree that older kids will have a blast with candy experiments. But younger kids do too! Even my toddlers loved dumping candy in water and stirring, stirring, stirring. In fact, my young son could go through an entire Halloween haul in one evening, just dumping it all into a bowl of water to make "candy soup."
One comment in this article mentioned that many military organizations do not want candy shipped to them. If true, this would put a crimp in those dentist buy-back programs. More investigation required.