One of the staples of kitchen chemistry for kids is making sugar crystals or rock candy. Why not? It is educational and it tastes good, too. [Science with Screens] has a different kind of crystal ...

This principle of binding sugar molecules is important not only in making fudge but most candies. Some kinds of candy — like gummies — get their texture from having no crystals, while rock ...

and a lack of crystal development typically means that you didn't use enough sugar. In this case, you can reheat the rock candy syrup and add more sugar until you achieve the proper consistency ...