In a large bowl, combine the snack mix, blueberries, cranberries, and sunflower seeds.
Place the white chocolate chips into a medium, microwave-safe bowl. Melt in the microwave on High for 60-90 seconds then stir. Melt for an additional 30-60 seconds, if needed.
Drizzle the melted chocolate over the snack mix, and stir until well coated. Turn the mix out onto a large piece of wax paper, sprinkle with blue and red candies, then allow the white chocolate to stand at room temperature for about 1 hour to harden. To serve, break the mix up into large chunks.