How To make "Ghoul Ade" For Halloween

1 Envelope Kool-Aid grape flavor unsweetened mix
1 Envelope Kool-Aid orange flavor unsweetened mix
2 Cups sugar
3 Quarts cold water
1 Bottle (qt.) ginger ale -- chilled
Mix Kool Aid's together with sugar, in large pitcher. Add water and mix. Just before serving, add ginger ale.