Mix one pack of green Kool Aid as directed on the back of the package. Combine it with one liter of 7 Up, and just before serving time scoop in 1 container of green sherbet ice cream. It makes a cool refreshing treat.
To add interest lay gummy worms over the edge of the punch bowl, and on the table around the punch.
You can change the color of the Kool Aid, and the flavor of the ice cream to suit other party themes.