This is a large toy cube on a keychain. I've been thinking about adding this to my son's school bag as he collects keychains on it, but this one is too big for that. It would be nice as a small fidget toy to keep the kid busy for a few minutes. I'm not sure I would hang it on my bag because of the size. There is no puzzle inside, you just unfold it and then you can fold it back together. Though it's hard to remember how to get him back the way he was, so maybe that's the riddle!
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