Combine 1/2 pkg gelatin and one pkg red Jell-O in bowl and add boiling water. Stir until dissolved.
Let it cool to lukewarm and then add the whipping cream and about 8-10 drops of green food coloring (to get the milky red color). Stir again.
Stretch out the bendy part of all of your straws. Place them all into a bowl or container. The tighter they are packed in, the better. I like to add a large rubber band around them.
Pour the Jell-O mixture into the straws. Let it set until firm. You can refrigerate overnight if you have time.
Using a rolling pin, roll over the straws and squeeze them out. You can also hold the straws under warm water to release the worms.
Add slimy worms to a bowl and serve your spooky treat!