Spongebob Episode 35A (S2 E28) THE SECRET BOX by VengefulVulpine on DeviantArt
The Box | SpongeBob | Remember trying to figure out what was in the box? | By Remember When | Facebook | Gee, Patrick sure is a heavy sleeper. Who said that?
SpongeBob SquarePants Season 2 Review: The Secret Box/Band Geeks - YouTube
Spongebob] In the Episode "The Secret Box", The box's secret compartment that is opened by pulling the secret string is foreshadowed earlier when Patrick pulls Spongebob's tongue in his sleep : r/TVDetails