Elmer Sglue is a student in Pokey Oaks Kindergarten. He has curly hair and wears thick glasses. He appeared in "Paste Makes Waste," where he became a giant monster and wanted revenge for everyone picking on him because he was eating glue. He befriended Buttercup at the end when she apologized for making fun of him. Elmer is voiced by Dee Bradley Baker.
- In "Speed Demon", three Elmer Sglue-like figures can be seen running from school after the bell rings.
- It's implied that Elmer has eyesight problems since his glasses are very thick.
- It is unknown how he returned to his human form after turning into a paste monster.
- His name is a pun on the glue brand Elmer's Glue.