Cut watermelon into 1-inch cubes. (See our video on How to Cut a Watermelon.) Place in a large bowl.
Cut feta into 1-inch cubes.
Take the skewer sticks (or use a large toothpick as shown) and begin threading items in this order: watermelon cube, feta cube, basil or mint leaf, cherry tomato. You can do one set of this combination or add more for a larger serving.