In a large punch bowl, combine the lemon-lime soda, white cranberry juice, and blueberry drink mix. Stir well until all the ingredients are mixed together thoroughly.

Gradually stir in the sugar. Keep adding sugar until the punch reaches your desired level of sweetness.

Once mixed, float the scoops of vanilla ice cream on top of the drink. As the ice cream begins to melt, it will create frothy white clouds.