I made rock candy "confetti" which decorated a dessert table I had for a party, I did it like this without the strings or sticks.
You need 1 cup water and 2 cups white sugar and the food coloring of your choice.
Begin by pouring the water into a saucepan, and stir in the white sugar and food coloring until the sugar almost completely dissolves. Cook the mixture on medium heat, and continue stirring until the sugar is no longer visible. Remove the candy syrup from the heat source, and allow it to cool completely. Once the colored candy syrup has cooled, pour it into a plastic container and allow it to sit undisturbed for around 10 days. The water will gradually evaporate and colored crystals will form.
Once the colored mixture has turned into rock candy, turn the plastic container over inside of a colander. Once the remaining moisture has drained away, the colored formations can be broken into bite-size pieces and placed on paper toweling to dry.