Found this hidden behind a cabinet in our new home. Any ideas about what is this?

Have you ever been in your own kitchen — minding your own business — and suddenly stumbled upon something that made you pause?
Something that didn’t look like it belonged.
Something that looked… out of place.
That’s exactly what happened to me.
I was standing in the kitchen, avoiding adult responsibilities, when my eyes caught a strange seam behind one of the cabinets — a little wooden panel, slightly warped, with a faint outline like it had been opened once… and never quite closed the same.
Curiosity took over.
I moved the cabinet.
I squatted.
I knocked.
And then I opened it.
What I found inside wasn’t treasure.
Not gold.
Not a secret room.
But it was something worth sharing.
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