I bought this as a gift for a colleague and it broke after about five minutes of sorting. We have the usual "game" where I shuffle his Rubik's Cube and he sorts/fixes them while we talk work stuff. I thought it would be fun to buy him something more complicated and I saw this thing. I mixed it up, and it seemed to me that it was built very loosely, and while he was thinking how to solve it, 3 or 4 stones fell down. I hope I just got a "bad batch" and others don't experience this. It was a real disappointment.
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