Do yourself a favor and make these for the next Halloween thing you are invited to. You won't be sorry! They are so cool!
Extend straws to full length and place bendable-neck-side-down in a container that can hold them close together standing up, like a tall cup. Wrap with a loose rubber band to hold straws together and upright.
Combine gelatins in a bowl and add boiling water; stir until gelatins completely dissolve. Chill until lukewarm, about 20 minutes.
Blend cream and food coloring with the lukewarm gelatin mixture. Carefully pour into the container, filling the straws. Chill until gelatin is firm, at least 8 hours, or cover and chill up to 2 days.
Pull straws from container. Pull straws apart. Run hot tap water for about 2 seconds over 3 to 4 straws at a time. Starting at the empty ends, push worms from straws with a rolling pin, or use your fingers. Lay on waxed paper lined baking sheets. Cover and chill. Worms will hold at room temperature for about 2 hours.