Gather sugar, water, a clean glass jar, a saucepan, a spoon, and a wooden skewer or string
Boil water in the saucepan
Add sugar slowly, stirring until no more dissolves
Remove from heat
Let the sugar solution cool for a few minutes
Wet the skewer or string
Roll the skewer in sugar and let it dry
Pour the sugar solution into the jar
Place the skewer or string into the jar without touching the sides or bottom
Secure it in place
Leave the jar undisturbed for several days
Remove the rock candy when crystals have formed enough
Let it dry before eating