In a shallow dish, mix corn syrup with a few drops of red food coloring using a toothpick until fully combined.
In a blender, add lime sherbet, pink grapefruit juice, and club soda.
For an adult version, add vodka to taste.
Blend on high for about 10 seconds until frothy and smooth.
Dip the rim of each glass into the red corn syrup, coating the edges.
Turn each glass upright and let the red syrup drip down the sides for a spooky effect.
Pour the punch into the prepared glasses.
Serve immediately and enjoy!