Gently mix together the watermelon and blueberries. Divide among 4 sundae bowls.
Top each bowl with a dollop of topping and garnish with red, white, and blue sprinkles, if using. Serve immediately.
National Watermelon Promotion Board
Representing 800 watermelon growers, shippers and importers nationwide, the goal of the National Watermelon Promotion Board is to promote the nutritional, culinary and convenience benefits of watermelon.