Kick up the challenge with the Rubik's 4x4. It's also known as Rubik's Revenge. Ages 8+.
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Kick up the challenge with the Rubik's 4x4. It's also known as Rubik's Revenge. Ages 8+.
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Rubik's Master, The Official 4x4 Cube Classic Color-Matching Problem-Solving Brain Teaser Puzzle 1-Player Game Toy for Adults & Kids Ages 8+
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