I start by slicing my honeydew and cantaloupe in half, scooping out the seeds, and cutting the flesh into even cubes. Keeping the pieces roughly the same size helps the kabobs look tidy and makes them easier to stack on the skewer. If I have extra time, I use a melon baller instead of cubing, since round melon balls look a little more polished on a party tray.
Next, I take each marshmallow and use the edible marker to draw two small dot eyes and an little oval mouth, like a classic cartoon ghost. I let them sit for a minute so the ink sets and doesn't smudge when I pick them up. If drawing isn't your thing, pressing two mini chocolate chips into the marshmallow works just as well for a quick ghost face.
Now I build each kabob in a simple pattern: a cube of melon, a grape, another piece of melon, and then a marshmallow ghost on top. I usually alternate the melon colors so the kabob has visual contrast from top to bottom. Repeating this pattern across all 16 skewers goes fast once you find your rhythm.
Once they're all assembled, I lay the kabobs flat on a tray lined with parchment paper and chill them in the fridge for about 15 minutes. This keeps the fruit crisp and cool, which matters a lot if your Halloween gathering is happening outdoors. Chilling also helps the marshmallow faces firm up slightly so they hold their shape.
Right before guests arrive, I arrange the skewers upright in a shallow bowl or lay them fanned out on a platter so the ghost faces are the first thing people notice. A little effort in the presentation goes a long way here, since these kabobs are just as much a decoration as they are a snack.