The 4981 Chum Bucket is a SpongeBob SquarePantS set released in 2007.
Plankton's restaurant, the set includes SpongeBob and Plankton (with helmet) minifigures, and also a robot customer, a Plankton's Burger walker and a Spongebob robot.
The set contains the Plankton's restaurant, with his lab, a small tank and Karen, Plankton's computer wife. The inside also includes a screen version of Karen above some standard technology, and latter for plankton to climb to get to the second floor.
This is a description taken from LEGO.com. Do not modify it.
4981 Chum Bucket
Stop Plankton's schemes!
At the Chum Bucket, Plankton hatches his evil plans to steal the Krabby Patty recipe. With the help of his computer, he'll use his spinning brainwasher, the Krabby Patty analyzer and even a robotic SpongeBob to get it!
Includes SpongeBob and Plankton, plus Plankton's Burger Walker, Robot SpongeBob and a robot customer!