The Krusty Krab Playset is a play set that SpongeBob plays with in the episode Bummer Vacation. It also has a mini version of it inside of it that's exactly like the playset except for the size difference.
It looks exactly like the Krusty Krab. It is unknown if it's made of metal, wood or plastic. It is most likely made of plastic.
CharactersThe action figures inside are SpongeBob, Patrick, Mr. Krabs, and Squidward.
Real Life Version
There was a real life version that was made by Smyths Toys according to a YouTube video.