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smooth twist Features a bright color and dot design It improves spatial awareness. It exercises the brain. It demonstrates the need for practice. It represents a pure example of true learning. It improves mathematical and analytical skills for students of all ages. Foster fun and competittive play among kids. Buy 1 pc 4x4 cube and get 1 pc free 3x3 cube. Fantastic Deal ! We want to give you the most sincere and worry-free service, we just lack your trust in us. Please trust us-what we received is not just an order, but a trust! We will go all out, just to give you the best service. We want to give you the most sincere and worry-free service, we just lack your trust in us. Please trust us-what we received is not just an order, but a trust! We will go all out, just to give you the best service.