Easy Watermelon Pie

This is such a nice, cool treat on a hot late spring/summer day.  It's super easy to put together and very tasty!  Enjoy!
-1/4 cup water
-1 (3 oz) package watermelon gelatin
-12 oz frozen whipped topping, thawed
-2 cup cubed seeded watermelon
-1 (9 inch) graham cracker pie crust
Bring the water to a boil.  Add the gelatin and stir until dissolved.  Set aside for a few minutes until cooled to room temperature.
Once cooled, stir in the thawed whipped topping.  Fold in the watermelon cubes.  Pour mixture into pie crust.  Cover and refrigerate for at least 2 hours.  Slice and enjoy!