
Great concept but too difficult to open. In the past I had several mazes and other puzzles with money gifts. All of this has a slot for inserting money or a gift card. What the seller does NOT tell you is that you (the dealer) must first solve the puzzle to insert the money. I tried repeatedly for several days even though I got the SECRET from a friend. I ended up sending the box with the receipt separately to my 18 year old grandson and asking him to open the box. He has. After many attempts to tap it vertically, he finally put it on his knee and kept tapping it until it opened after more than 20 minutes. It's too much work for me. I do not recommend this.

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