- Billy (cameo)
- Harold "Bill" Reginald (cameo)
- Shubie (cameo)
- Medley Fishbowl (cameo)
- Nat Peterson (cameo)
- Martin (cameo)
- Eugene H. Krabs
- Sheldon J. Plankton
Mr. Krabs and Plankton are at the beach and they have finished building a sand castle. Thereupon, a bully/show-off fish points at his sand castle saying "This is a castle!" The bully shows off his fancy sand castle then destroys Mr. Krabs' and Plankton's sand castle, saying that he's remodeling it. Mr. Krabs and Plankton smile at each other and the bully wonders what they are all happy about. Suddenly, he gets launched into the air by a secret spring trap under the sand. Plankton states "Bullies are so predictable" as the bully falls facedown onto the sand.
|( ‣ ) Associated production music|
|( • ) Original music|
|( ◦ ) SpongeBob music|
‣ Moloka'i Nui (a) - Kapono Beamer [Plays throughout the episode.]
- This short is tied with Crossing the Street, Leo, Taurus, Gemini, Documenting Our Road Trip, and Plankton's Holiday Hits which all have a 10/10 on SpongeBuddy Mania.
- The sand castle looks similar to another sand castle in "A Life in a Day."
- On The Pilot a Mini-Movie and the Square Shorts DVD, the short is listed as "Sand Castle - Swim Lessons" for some reason.
- This short premiered two years after the SpongeBob Saves the Day book was released.
- Krab's is younger and has different wardrobe in this episode.