Challenge your mind with the Mastermorphix, a 3x3 shape-modifying puzzle! This pyramid-shaped twisty puzzle comes with an instruction manual and stickerless design. The center piece features a new assembly, concealing the core for better symmetry. The split-lock design on the inner floor ensures a firmer assembly and smooth operation. Rounded corners enhance the look and improve corner cutting. The 36mm inner rounded corners boost POP resistance and reduce corner twisting. This stickerless variation boasts vibrant colors and is factory-lubricated for out-of-the-box performance. The 77.5mm size and curved surface provide a better grip and unparalleled color brilliance. ULTIMATE GIFT IDEA - Perfect for kids, friends, and family, from beginners to pros! Provides hours of fun, reduces stress, exercises your brain, and improves patience, memory, and dexterity.