(Thanks to www.sciencebob.com!)
The experiment is making your own Rock Candy and can be accessed here! This is a fun experiment for students because who doesn't love some candy?? The experiment can be tied into a lesson on solutions or reactions that take place during heating and cooling.
This is probably better done as a small group experiment or a demonstration because it does require hot liquids. If you are in a high school, depending on your students, this may be an experiment that they could handle on their own.