Pair the sweetness of frozen watermelon cubes with the spicy bite of ginger ale and the tart flavor of limeade for this refreshing, icy sipper.
Arrange watermelon cubes on a baking sheet. Freeze 30 minutes, or until solidly frozen. Working in batches, blend frozen watermelon, chilled ginger ale, 1/4 cup water and frozen limeade concentrate in a blender until smooth. Serve in chilled glasses.