The Saga of the Secret Box at DESA reminds us of a SpongeBob movie

So the question in DESA's ECOSOC Brain Room is what is on that Box?

SpongeBob SquarePants

(The Movie)

SpongeBob is running towards Patrick's house, ready to go jellyfishing. Patrick says he'll go with him, but must put away his "secret box" first. SpongeBob asks him what's inside the box, but Patrick refuses to let Spongebob see. Despite repeated attempts, SpongeBob is unable to get Patrick into opening the box, even after he tempts Patrick with secrets of his own.

That night, SpongeBob sneaks into Patrick's house and tries to sneak a peek while Patrick sleeps. However, due to the noise SpongeBob makes, Patrick wakes up and catches him in the act. He is shocked, and declares their friendship to be over. But, Patrick ultimately forgives him and opens the box. Inside, there is just a piece of string ("A secret string!" as Patrick describes it). SpongeBob comments on how he "should've known", but when he leaves, Patrick reveals to the audience the real secret; when he pulls the string, a secret compartment opens in the box, revealing an embarrassing photo of SpongeBob at "that Christmas party".