Use a small star-shaped cutter to cut 6 stars from the slice of cheese and another 6 from the watermelon. Slice the strawberries in half and set aside.
Take a slice of salami, fold it in half, then fold it in half again. Slide it onto a skewer through the center. Repeat with another slice, alternating the fold so it creates a ribbon effect. Repeat this process to make 6 salami skewers.
Thread a watermelon star onto another skewer, poking through one of the points so the star shape stays upright. Make 6 watermelon skewers.
Place a cracker toward the back of each cup.
Add a scoop of trail mix into each of the 6 cups—but save some for later to help hold everything in place.
Place one salami skewer on the right side of each cup and one watermelon skewer on the left. Fill in around the skewers with the remaining trail mix to help support them.
Add a handful of blueberries to each cup.
Nestle one strawberry half (cut side up) on the left side of the cup.
Top the blueberries with a cheese star next to the strawberry.
Pop the cups in the fridge until you’re ready to serve!