It's a purely black square of wood.
About the size of a Rubik's cube.
But it's tightly fitted, just like a complete block of wood.
However, Little Raccoon used both fuzzy paws to pull hard, and the wooden block easily opened... four millimeters.
Pull any further and it wouldn't budge.
The wooden block, because of the cracked gap, revealed intricate patterns.
Jia Xitong tried back and forth several more times, and it was the same each time. She looked up at Uncle Karl, "Uncle, what is this?"
"Didn't I say before I'd give you something? Take this, if you can open this box, what's inside is yours."
"What's inside?"
Jia Xitong's eyes sparkled as she looked at him.
"I don't know, you'll have to open it yourself."
The way this is said really piques one's curiosity.
Little Raccoon rubbed her paws and immediately declared grandly, "Uncle Karl, just wait, I'll open it in no more than three days."
Uncle Karl showed a kindly smile.
