Watermelon Pie 

1 - 9 inch graham cracker pie shell
1 (3 ounce) box watermelon flavored gelatin
1/4 cup water
1 (12 ounce) container whipped dessert topping
2 cups diced watermelon
                   
1. Mix together the watermelon gelatin and water. Fold
   gelatin mixture into the dessert topping. Add cut
   watermelon. 
2. Pour mixture into graham cracker crust. Cool in
   refrigerator for about 3 hours.