Start out by washing all your strawberries and blueberries. Quarter the strawberries and toss those and the blueberries into a serving bowl or BBQ friendly container.
Next, lets cut the watermelon into "watermelon steaks." In other words cut the watermelon into small disks, about 1 inch thick. Use the star cookie cutter to cut the watermelon into stars. Toss the stars in with the blueberries and strawberries.
There you have it...a healthy and extremely easy 4th of July fruit salad!