From SpongePedia, the First SpongeBob Wiki.
- They are a reference to finger puppets.
- Weirdly, SpongeBob had one of Wormy the day he turned into a butterfly, so he had to knit one overnight.
- SpongeBob uses them to represent friends he thought the monster ate.
- It is unknown if he has them on his hands anymore.
- On the right image, you can clearly see that they don't have mouths.