Kool-Aid Pie

1 ready-made graham cracker crust
1 (14 ounce) can sweetened condensed milk
1 (0.15 ounce) envelope unsweetened Kool-Aid (any flavor)
8 ounces Cool Whip, thawed

Mix sweetened condensed milk, Kool-Aid and Cool Whip. Blend well. Pour into crust. Refrigerate. Ready to eat within minutes.