Green Mint Punch slush

This is a different green punch then what you will find in the Dahl cookbook. And this one is a slush! Yum.

2 pkg. lemon-lime kool-aid
4 cans frozen grapefruit juice
4 cans frozen pineapple juice
1 can frozen limeade or lemonade
1 small can crushed pineapple
mint leaves steeped or mint flavoring

Defrost the frozen juices and mix everything together. Make a simple syrup by cooking 4 cups of sugar in 5 cups of water. Add that to the juices and mix well. Freeze in 4 or 5 2 qt. containers. When you serve it crush it up and add 7-up.