Prepare the jello by adding hot water the to mix in a medium sized bowl. Mix until completely dissolved.
Then add a cup of cold water and mix.
Pour into your jello cups.
Place in the refrigerator, and let it set. I let it set overnight, but it only takes a few hours to set.
Meanwhile, prepare your spooky eyes by drawing black eyeballs on the mini marshmallows and skittles.
Once the jell-o has set, top it with plain mini marshmallows. Then you can top it with the scary mini marshmallow eyes and skittles, vampire teeth gummies, and jelly worms.
Serve immediately.