I make this every year on Christmas Eve and the kids go nuts over it.
1 lg bottle of hawiian punch
1 liter of ginger ale
2 cans of unfrozen lemonade
1 1/2 gallon of rainbow sherbert
the key is to pour the ginger ale over the rainbow sherbert to make a froth, so put the ginger ale in last. You can adjust it to your taste, but I have not met a kid(or adult) yet who does not love this punch.