Pet rocks are rocks that Patrick, Squidward, and SpongeBob treat as pets. They first appear in the episode "The Great Snail Race." Patrick's googly pet rock appears in the episode "The Googly Artiste." He makes it using a lot of googly eyes and uses glue to stick them on the rock. He sells them off as art. The episode "Once Bitten" reveals that Squidward has a pet rock collection, which Gary covers in slime. Like some of Patrick's pet rocks, they too have googly eyes. They also are in many shape
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