It Rubiks revenge!
If you are one of those people who had difficulty with the original Rubiks cube, then this new version of the puzzle is going to give you nightmares for the rest of your life. It is called the ultimate 777 curve IQ cube.
The sevens come in because of the seven by seven by seven cube design that says how hard it is going to be! In addition, there is a curve in there too just make it slightly more awkward. The 777 will cost you around $76 and a lot of brain power.
Source [Geeky Gadgets]
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