Step 1: Prepare Glasses: Fill four tall glasses with ice cubes. Optionally, rim the glasses with red sugar for added effect.

Step 2: Mix the Drink: Pour 1/4 cup grenadine into each glass. Slowly add lemon-lime soda and optional orange juice over the back of a spoon to create a layered effect.

Step 3: Garnish: Add maraschino cherries on top. Optionally, add gummy worms hanging over the edge or small candy spiders for spooky presentation.

Step 4: Serve: Serve immediately while soda is still fizzy. Provide small straws or cocktail stirrers for guests.