The playground is an amusement area that appears in the episode "Krabby Land."
This playground features a slide, sandbox, monkey bars, swings, a seesaw, and a "merry-go-round."
SpongeBob and Mr. Krabs spy on the children to see why they are attracted to the playground. All of the kids are having fun. Mr. Krabs interrupts them and lifts his hands up and starts wailing about the children not coming to the Krusty Krab. All of the children notice and continue to look at him.
Mr. Krabs is thereby inspired to create an unsafe variation of the playground outside of his restaurant.