Wash the grapes thoroughly and pat them dry with a paper towel.
In a medium bowl, combine the granulated sugar and Kool-Aid drink mix. Stir until well mixed.
In a small bowl, mix the water with the Kool-Aid sugar mixture to create a syrup.
Dip each grape into the syrup, ensuring they are fully coated. Allow any excess syrup to drip off.
Place the coated grapes on a baking sheet lined with parchment paper.
Freeze the grapes for at least 2 hours or until fully frozen.
Serve the frozen Kool-Aid grapes as a refreshing snack.