Recent Toys Molecube Mefferts Brain Teaser Puzzle, 2.5" Plastic Can you get 9 unique colors on each side? Its a six-sided Sudoku with a bold infusion of color that will set your senses on fire. A challenging brain teaser puzzle for adults and children alike! Display on your nightstand, shelf, or living room as a decorative conversation piece. The perfect gift for the puzzle enthusiast in your life!