The goal is similar to the classic Rubik's Cube in our National Museum of American History, Behring Center: twist and rotate this unique contraption until each face is a solid color. But the unique Gear Ball Puzzle is made up of gears, not cubes, so it's even more satisfying to slide everything into place. This Dr. Toy's Award-winning puzzle hones logic, strategy, and fine motor skills for kids and adults alike.