Description
After discovering and memorizing its solution, put a prize of your choice in the box (money, cards, a piece of paper with a promise, etc.) and call another person to come and solve it. As the product owner you can set the timelines and bets yourself. If the 2nd person manages to open it within the time limit without breaking it, then they get the prize in the box. But if he fails then he should reward you with the agreement you made before starting his attempt.
The product consists of 2 pieces of wood and a glass-like plastic to show the prize inside. Have fun!
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