Tie a short piece of cotton string to the middle of the pencil or stick. Attach a paper clip to the end of the string for a weight.
Moisten the string very lightly, and roll in a bit of sugar (this will “attract” the sugar crystals from the syrup to the string). Place the pencil at the top of the glass or jar with the string hanging down inside.
Heat the water to boiling, and dissolve the 2 cups of sugar into it. For the biggest crystals FAST, heat the sugar-water solution a SECO dissolve as much additional sugar as you can into it. Add a few drops of food coloring to the solution if you want colored candy.
Pour the solution into the prepared glass or jar and leave undisturbed for a couple of days.