Slice the watermelon and apples into half inch thick slices.
Cut out the star shapes using different size cutters and add to a large bowl.
Make fruit glaze by mixing lemon juice and maple syrup until combined.
Thread fruit unto wooden skewers in a red white and blue pattern or any patter you prefer and brush them with the fruit glaze.
Serve immediately or chill for a few hours before serving.
Notes
You can sub in marshmallows or white chocolate or angel food cake for the white fruit.
Vary the fruit you add in. See suggestions below.
You can serve this as a fruit tray instead of skewers - just lay out on a tray.
Serve these in an American flag shape, which will involve mostly threading red and white fruit together, but a few skewers will be half blueberries only.