The 3D Crystal Puzzle the Thinker takes puzzling to a new level. The beautiful puzzle features uniquely-shaped, interlocking, translucent crystalline pieces that take puzzling to a whole new dimension. Delight your mind and eyes with this 3D brainteaser that’s beautiful enough to adorn any room. When you’ve pieced it together, you’ll be proud to display this sleek and unusual puzzle. Moderate difficulty, suitable for ages 14 and up. When you’ve joined the interlocking plastic pieces together you are left with a statue ofthe thinker that any art afficionado would be happy with.